Davis Cup Research Articles

Using simulations to compare the current Davis Cup ranking system to Elo.

The Davis Cup is the premier men's team event in tennis, run by the International Tennis Federation and in which over 130 nations compete. It uses a merit-based ranking system that allows nations to gain a pre-determined number of points when they win. The rankings are integral to the competition structure and used in the draws of every round. Therefore, it is essential that the ranking method performs well with respect to required performance criteria of the International Tennis Federation. The Elo rating method is a commonly used method of rating and ranking participants in a competitive exercise and is used by FIFA for the ranking of male and female national teams. The performance of the current Davis Cup ranking method and Elo rating were compared using a simulation of the Davis Cup competition structure. Four criteria were used for the comparison: Finishing Order Correlation, Skill Level Correlation, Responsiveness, and Protection. Such a comparison has not previously been published. The two methods were comparable across three of the criteria, with the Davis cup easily outperforming Elo in responsiveness. Indeed, the Elo method had such poor responsiveness that improved performance may not be fully recognised within a player's career. An alternative method of optimising the Elo K-factor parameter was developed and this improved the performance of Elo to match the current Davis Cup method. In conclusion, the current Davis Cup ranking method is performing at a standard that cannot be matched by typically optimised Elo but can be matched when an alternative optimisation method is used. Therefore, no evidence was found to suggest that the current Davis Cup ranking method could be improved upon by using Elo. However, alternative K-factor optimisation methods should be considered when applying Elo to a competition.

Epidemiology and Factors Influencing Davis Cup Retirements Over the Past Twenty Years.

The demands of professional tennis, including physical and psychological aspects, contribute to the frequency of retirements at elite levels of the sport. The aim of this study was to explore the frequency of injuries and the factors that influence the retirements of professional tennis players competing in the Davis Cup over the last two decades. Retrospective cohort study. The data set includes data from 6,060 men's singles matches that included 1,814,141 games from Davis Cup ties played between 2000 to 2019. Factors that might influence the retirements were studied by means of generalized linear models using Poisson distribution. Incidence rates by 1000 games and incidence rate ratios of retirements are provided as association measures. The retirement incidence was 1.05 per 1000 games [95% CI: 0.90, 1.21]. The main risk factors associated with retirements were matches played on hard courts (IRR: 2.52 [95% CI: 1.32, 4.83]) and matches played in the final two matches of the tie and in a best-of-5-set format (IRR: 2.63 [95% CI: 1.69, 4.09] and IRR: 5.52 [95% CI: 3.50, 8.69], respectively). The most common injuries that led to retirements were those affecting the lower extremities, specifically involving muscular or tendinous tissues. This study provides valuable insights for coaches, players, support teams, and epidemiologists regarding retirements and their associated risk factors in Davis Cup tournaments. These findings may guide future research and inform strategies aimed at managing player health and performance in professional tennis. Level 2b.

The comparison of a top-level Japanese tennis player's serve-performance evolution between two seasons

This study sought to determine the impact of changes in serve performance (relationship between speed, spin rate, reproducibility, and impact height) on world rankings for one top-level Japanese tennis player in 2017, when he became the All Japan Student Champion, and in 2022, when he represented Japan in the Davis Cup and won the ITF tournament (M25 Monastir: 10 Jan - 16 Jan 2022). This study clarifies the impact of changes in serve performance on world rankings in 2022. The results showed that, among the three types of serves (flat, slice, and kick), there were higher values for slice and kick in 2022 compared to 2017. Higher ball speed values were found for flat in 2022 and lower values for slice and kick in 2017. In 2022, all serve heights were higher, resulting in an increase in the flat success rate, which had the lowest reproducibility. These results suggest that longitudinal measurement and evaluation of the relationship between speed, spin rate, reproducibility, and impact height when serving is important for improving competitive performance.

Heart Rate Variability in Elite International ITF Junior Davis Cup Tennis Players.

The aim of the present study was to investigate the evolution of the HRV during an international team tennis tournament in elite junior tennis players. A total of 11 tennis players, with a mean age of 15.36 (0.67) from six nationalities, participated in this cross-sectional study. Participants were measured one day before the event, before the first match, and before the second match of the ITF Junior Davis Cup event. Each of the registers lasted 5 min and the time domain, frequency domain and non-linear variables were extracted. The tournament took place in Valencia (Spain). Results showed that there was not a significant decrease in the heart rate variability (HRV) induced by precompetitive stress. However, significant differences (p-value < 0.05) were found between baseline and second match pre-competition HRV values in low frequency (LFNu) (p-value = 0.008) and high frequency (HFNu) power (p-value = 0.008), LF/HF ratio (p-value = 0.008) and Sample Entropy (SampEn) (p-value = 0.033) variables. Furthermore, cognitive anxiety (measured by CSAI-2r) (p-value = 0.017) and anxiety (measured by STAI-S) (p-value = 0.042) were higher before the first match than before the second match. Coaches and physical trainers could use HRV to control and manage the precompetitive anxiety of junior tennis players. The experience in international tournaments and the familiarization with the environment in the second match could explain these results.

Pre- and post-competitive anxiety and match outcome in elite international junior tennis players

This study aimed to analyse the impact of match outcome (win or lose) in an elite international tennis competition on pre-competitive anxiety and self-confidence. A cohort of Under-16 elite boys (n = 18), with a mean age of 15.44 (0.616) years and an international competitive experience of 4.44 (1.89) years, which were representing six national teams participated in this cross-sectional study. The assessments took part in a qualifying stage of the International Tennis Federation (ITF) Junior Davis Cup competition. During the tournament, participants played the best of three set matches. The Competitive State Anxiety Inventory – 2R (CSAI-2R) and the State-Trait Anxiety Inventory (STAI-E) were employed to assess the pre-competitive anxiety before and after the tournament's match. Cognitive and somatic anxiety were slightly higher before than after the matches. No significant differences were found between the pre-and post-match measures. However, significant differences in cognitive anxiety, state anxiety and self-confidence were found when comparing pre-match and post-match values between winners and losers. In this regard, winners showed a significant reduction in state anxiety and cognitive anxiety after the match. According to our results, intervention programmes should incorporate tools that will assist players in their management of anxiety and self-confidence, specifically with those players who lost the match.

Effective serving strategies in men’s doubles Davis cup matches: an analysis using tracking technology

ABSTRACT Despite the importance of the serve in doubles tennis, there is very little information on the tactical characteristics of this game situation. The aim of this study was to analyse the differences in the spatial-temporal characteristics and the effectiveness of the serves depending on their direction in professional doubles tennis. Using the Hawk-Eye system, 20,419 serves from 96 Davis Cup doubles matches played between 2010 and 2019 were analysed. First serves to the Wide and T zones showed the highest effectiveness. The fastest serves were those played to the T, while the slowest were those played to the Wide zone, except for the second serves on the Deuce side, where the opposite occurred. The serves played to the T were hit from positions closer to the centre of the court, and the time from serve contact to ball bounce was shorter than in the rest of the serves played to other directions. Generally, compared to singles tennis, players served from positions further away from the centre of the court. The data provided in this study have clear practical implications, both for the design of specific training sessions and for the tactical preparation of matches.

Daniel Prenn – From Germany’s First Man in the Top Ten to ‘“No Nationality” Man’?

This biographical study thematizes the life of Daniel Prenn, Germany’s first male tennis player in the world’s top ten ranking. Emigrating from St. Petersburg to Berlin as an adolescent, he soon developed a great talent in tennis, became Germany’s number one player and represented the country in the Davis Cup before in 1933 – at the height of his success – he became a famous victim of the sport segregation by the National Socialists due to his Jewish background. Subsequently, Daniel migrated to the United Kingdom and was able to continue his tennis career. This article explores his story and contextualizes it before the historical background, as his life is connected to numerous contemporary developments of the time such as antisemitism, emigration, naturalization and more. Further, the study provides insights into the role of sports regarding processes of integration and identification. It looks at the trajectory of an early sports migrant, his motivations, experiences, obstacles and successes. So far, Daniel Prenn’s story has been absent from (sports) history, and his life has not yet been studied in detail nor remembered comprehensively. This biographical account is a first attempt at changing this.

A Cluster Analysis Approach to Profile Men and Women’s Volley Positions in Professional Tennis Matches (Doubles)

(1) Background: Tennis ball tracking technology allows the aquirement of novel and reliable data about several performance indicators, such as volley positions. This information is key to understand match dynamics in doubles tennis and to better help preparing players for the demands they will face in match play. As such, the purpose of this study was to describe and compare the different types of volley positions in men’s and women’s doubles professional tennis. (2) Methods: Ball tracking data were collected for 46 women (Billie Jean King Cup) and 96 men’s doubles matches (Davis Cup). The variables used were the distance to the net, the distance to the centre of the court and the height of the impact. A K-Means cluster analysis was used to identify in each subsample different profiles of volley locations. (3) Results: The inferential analysis revealed differences in men’s (distance to the net η2 = 0.72, distance to the centre of the court η2 = 0.77 and impact height η2 = 0.63) and women’s subsamples (distance to the net η2 = 0.48, distance to the centre of the court η2 = 0.52 and impact height η2 = 0.51). (4) Conclusions: The results allowed the suggestion of a higher variability in men’s matches, as there were seven different clusters identified, and only four in women’s.

Analysis of the differences in serve effectiveness between Billie Jean King Cup (former Fed Cup) and Davis Cup doubles tennis matches

The doubles game has considerable relevance in professional tennis, especially in team competitions such as the Billie Jean King Cup (former Fed Cup) (BJKC) and the Davis Cup (DC). However, there are very few studies that have carried out quantitative notational analysis to provide information on the specific features of this tennis modality. The goal of this study was to analyse the differences in serve direction and effectiveness of male and female teams in matches played at BJKC and DC ties. A total of 29,207 serves; 7,578 of BJKC and 21,628 of DC matches were analysed. The data was obtained through the Hawk-Eye system. The results showed that with the first serve, both BJKC and DC teams tried to move the receiver by serving to zones W (wide) and T to take the initiative of the point, while with the second serve teams took lower risks and mainly served to zone B (body). In general, in DC matches the effectiveness of the serve was greater than in BJKC ones. The first serve effectiveness in DC matches was found to be higher in each direction, while the differences in the effectiveness of the second serve was only found in the zone C (body) of the advantage service box. This information can be particularly relevant for coaches to design the doubles training sessions and the strategic planning of doubles matches on reliable and quantitative information.

Procedural Fairness in the International Tennis Federation’s Disciplinary Regime

This article examines the International Tennis Federation’s disciplinary regime as it applies to on- and off-court indiscipline, in order to assess the extent to which it complies with well-accepted requirements of procedural fairness. In so doing, it draws on two recent appellate decisions of the ITF-appointed Independent Tribunal in the cases of Ilie Năstase and Marcelo Rios, both former elite professional players who were at the time of their respective transgressions appointed to positions within the Romanian Fed Cup and Chilean Davis Cup teams, respectively.

Discouragement effect and intermediate prizes in multi-stage contests: Evidence from Davis Cup

The discouragement effect of being the lagging player in multi-stage contests is a well-documented phenomenon. In this study, we utilize data from 2447 Davis Cup matches in team tennis tournaments to test the effect of being behind or ahead on individuals’ performance with and without intermediate prizes. Using several different strategies to disentangle the effect of being ahead in the interim score from the effect of selection, we find the usual discouragement effect. However, the discouragement effect disappears after the introduction of intermediate prizes in the form of ranking points. The lagging favorite had close to a 20-percentage point greater probability of winning compared to matches without such a prize. We show that this result is not driven by the selection of better players into tournaments with intermediate prizes. As predicted by previous theoretical studies, our empirical findings suggest that intermediate prizes may mitigate or even eliminate the ahead–behind effects that arise in multi-stage contests.

Dwight Davis and the Foundation of the Davis Cup in Tennis: Just Another Doubleday Myth?

Abstract Dwight F. Davis is widely credited with having invented, or at least conceived, the original idea for the international tennis competition that bears his name, the Davis Cup. This paper aims to debunk this myth through comprehensive critical analysis of the period preceding Davis’s apparent epiphany in 1899. Previous national-team-based competitions are investigated, alongside key figures in American and British/Irish tennis, to demonstrate that numerous others had proposed the idea for an international team-based competition long before Davis and that Davis may have appropriated his idea from others with whom he came into contact. Davis’s wealthy background, political ambitions, and model-American image arguably helped smooth the process of his idea being officially accepted by the United States National Lawn Tennis Association, which likely saw in Davis a perfect “front-man” for American tennis at a time when the nation used sporting prowess to promote its identity, particularly in relation to the British, in international sporting competition.

Epidemiology of injuries in tennis players.

To review the recent literature regarding the epidemiology of tennis injuries at all levels of play, and to discuss recent findings in injury surveillance by the Association of Tennis Professionals (ATP). Following the release of a consensus statement in 2009 calling for standardized documentation and analysis of tennis-related injuries, multiple studies have been published describing longitudinal injury incidences at Grand Slam tournaments and the Davis Cup. Recent efforts by the ATP have further elucidated injury patterns on tour. There have also been recent high-quality studies on injury trends among collegiate and elite junior tennis players, bringing attention to musculoskeletal injuries and systemic illnesses that young tennis players may be susceptible to. Recent efforts in injury surveillance by the ATP and at the collegiate and junior levels have highlighted injury trends that will help guide injury prevention strategies at various levels of play.

Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China

Dew is an important water source for plants in arid and semi-arid regions. However, information on dew is scarce in such regions. In this study, we explored dew formation, amount, and duration of rain-fed jujube (Zizyphus jujube Mill) trees in a semi-arid loess hilly region of China (i.e., Mizhi County). The data included dew intensity and duration, relative humidity, temperature, and wind speed measured from 26 July to 23 October, 2012 and from 24 June to 17 October, 2013 using a micro-climate system (including dielectric leaf wetness sensors, VP-3 Relative Humidity/Temperature Sensor, High Resolution Rain Gauge, and Davis Cup Anemometer). The results show that atmospheric conditions of relative humidity of >78% and dew point temperature of 1°C–3°C are significantly favorable to dew formation. Compared with the rainfall, dew was characterized by high frequency, strong stability, and long duration. Furthermore, heavy dew accounted for a large proportion of the total amount. The empirical models (i.e., relative humidity model (RH model) and dew point depression model (DPD model)) for daily dew duration estimation performed well at 15-min intervals, with low errors ranging between 1.29 and 1.60 h, respectively. But it should be noted that the models should be calibrated firstly by determining the optimal thresholds of relatively humidity for RH model and dew point depression for DPD model. For rain-fed jujube trees in the semi-arid loess hilly regions of China, the optimal threshold of relative humidity was 78%, and the optimal upper and lower thresholds of dew point depression were 1°C and 5°C, respectively. The study further demonstrates that dew is an important water resource that cannot be ignored for rain-fed jujube trees and may affect water balance at regional scales.

Don’t Play Ball with South Africa: The United States, the Anti-Apartheid Movement, and the Davis Cup Protests

By the mid-1970s, South Africa’s sporting teams had been banned from international competition by nearly every governing sporting body due to the nation’s apartheid policies. Yet, South Africa remained eligible to play in the Davis Cup, the prestigious international team tennis tournament. Thus, tennis became one of the last frontiers in the global sport boycott, a critical component of the transnational anti-apartheid struggle. At the same time, apartheid had moved from an issue on the fringe of American society at the beginning of the decade to an increasingly mainstream and influential protest movement taking place in various arenas across the United States, from labour unions to churches to college and university campuses. This article examines the efforts of Richard Lapchick, the American Coordinating Committee for Equality in Sport and Society (ACCESS), and other activists in the United States to force the International Tennis Federation (ITF) to ban South Africa and its athletes from competition in the Davis Cup. It explores the place of sport in the struggle against apartheid in the United States at the end of the 1970s.

Athletic performance, training characteristics, and orthopedic indications in junior tennis Davis Cup players

Our study aimed to examine athletics, training characteristics, and prevalence of musculoskeletal symptoms of male junior tennis Davis Cup players (DC) in comparison with their regional counterparts, as well as to evaluate the impact of age and performance level on training characteristics. Twelve junior DC (male) and two samples of regional squad players (RS1 n = 60 males, n = 47 females; RS2 n = 59 males) participated in a physical testing, an interview for data evaluation on training characteristics, and a questionnaire survey of orthopedic injury frequency. Results indicate higher physical performance levels (effect size (ES) 0.75–1.26) and training volumes in DC (ES 1.23–1.66). In DC, significant relationships were found between total training volume and tennis ranking ( r = −0.78), age and physical training volume ( r = 0.82), and age and total training volume ( r = 0.62). Injury frequencies showed moderate to high prevalence with no differences ( p &gt; 0.05) between DC and RS. Given the demands of elite tennis and the important role of service in the modern game, more efforts are necessary to develop training prescription for both performance enhancement and prevention strategies.

The ‘Ubiquitous Apostle of International Play’, Wilberforce Vaughan Eaves: The Forgotten Internationalist of Lawn Tennis

In the context of sustained imperial dominance during the late Victorian era, foreigners perceived British playing styles, methods and approaches to lawn tennis as ‘blueprints’ for aspiring players. Those seeking to learn the game were largely dependent on observing skilled performers, however before the mid-1890s, most of the best British players declined to venture to Australasia and America, perceiving the opposition as inferior and their championships unworthy of their participation. Moreover, while British-trained coaching-professionals – widely considered the world’s best – offered instruction in a small number of clubs, they also rarely ventured outside of Europe. Alongside these barriers, the parochial and ethnocentric Lawn Tennis Association was less than proactive in their approaches to fostering international relations. One man, however, Dr Wilberforce Vaughan Eaves, did more for the internationalization of the sport than anyone else during this period, travelling extensively in America, South Africa and Australasia, demonstrating his skills, offering instruction and advising officials. Consequently, he helped develop the sport’s international character, laying the foundations for the Davis Cup, helping to foster Anglo-Australasian and Anglo-American relations, and hastening the development of foreign players, particularly in Australasia. This paper assesses the notable contributions of a player, coach and diplomat who has been largely ignored.

American-British Sporting Rivalries and the Making of the Global Sports Industry

This article examines a key aspect of American sports history within a transnational context. Whilst the internal histories of American sport are exceedingly rich and voluminous, our general understanding of the nation’s contribution to the international, global scene is less well-known. The postcolonial rivalries between American and British sports communities fuelled the development of what became open, international cup competitions in such sports as tennis and golf which bolstered an emerging global industry in the first half of the twentieth century. The transnational process of initial American imitation and absorption of British models have been well documented within the scholarly literature and debates in American Studies for decades; however, the gradual reversal of this imitative process to a more reciprocal relationship has received far less attention (especially within sports history). The authors show how the Davis Cup competition is an example of the way in which Americans indigenised a cultural sporting import, namely tennis; created a nationalistic, international sporting competition; and effectively exported it back to Britain within the wider context of a burgeoning, imperial rivalry on the world stage between these two, rival sporting nations. This process not only expanded the worldwide consumption of sport but spreads a spirit of cultural emulation within twentieth-century global consumer culture. This transnational perspective also illuminates the thorough de-provincialising of the notion of “American Exceptionalism” within the field. When, for example, the respective imperial histories of the two nations are considered comparatively, the “American” story does not look so “exceptional” after all. Though American exceptionalism adapted some British sports to suit American sensibilities, the sporting cultures of the two nations and within their zones of influence remained similar in many respects. This was particularly true in amateur sports such as tennis, rowing and track and field (athletics to the Brits) as well as in the sport of golf. In the twentieth century, many sports adapted as focus shifted from nationalism and national worth towards professionalism and international spectacle.

Epidemiology of tennis injuries: An eight-year review of Davis Cup retirements

Tennis practice, especially at elite levels, may place players at risk for debilitating musculoskeletal injuries. The aim of this study was to analyse the epidemiological pattern of retirements due to medical conditions sustained by tennis players during Davis Cup matches in the 2006–2013 period. All uncompleted matches due to a medical condition (injuries and illnesses) occurred in the above-mentioned competition were collected from the official source, registered and analysed according to published guidelines. The overall incidence of match retirements was 1.66% (12/719). The injury rate was 6.05/1000 playing hours; and 6.64/1000 match exposures. Musculotendinous lesions were the most common type of injury (66.66%). The incidence of lower-limb injuries was higher than upper-limb and trunk lesions. The incidence of retired matches due to medical conditions was higher in hard courts than in clay courts (2.97% and 0.90%, respectively; p = 0.04), while the median value of inactivity of injuries was 32.0 days (range 3–297). In conclusion, the incidence of retirements due to medical conditions in Davis Cup matches was low supporting the assumption that elite tennis is a low-risk sport activity. Findings provided scientific evidences of injury patterns among male professional tennis players and may contribute to conduct better injury prevention strategies.

Advantage Receiver: Australia and Japan's Return to the Davis Cup after World War II

This article investigates Japan's readmission into the International Lawn Tennis Federation after World War II and its return to the Davis Cup in 1951. In seeking readmission, the Japanese Tennis Association sought support from Australia, where the animosity resulting from recent wartime conflict was particularly strong. The article examines particularly the ways in which the Council of the Lawn Tennis Association of Australia dealt with the proposal for Japan's readmission, and indicates how its strong opposition was initially respected by other national tennis bodies but ultimately mediated by their desire to readmit former enemy countries. The article suggests that tennis relations between Australia and Japan in the early post-war period provided a useful means for the respective governments to promote goodwill between the two countries once the diplomatic relationship was resumed and were an important facet of the history of Australia–Japan relations after World War II.