Abstract
The Chinese Football Super League (CSL) introduced the video assistant referee (VAR) in the 2018 season, but the effect of VAR intervention has not yet been analyzed. The purpose of this study is to explore how varying frequencies of VAR interventions affect performance indicators in the CSL. VAR interventions were categorised into three groups, none (VAR0 = 198), one (VAR1 = 184) and two or more (VAR2 = 194). The performance variables included scoring-related variables (goals, shots, shots in the penalty area and penalties), attacking and passing-related variables (passes, crosses and free kicks) and defensive-related variables (tackles, fouls, yellow cards and red cards). The Kruskal-Wallis tests were used to examine the differences in performance variables among the different groups. The findings of these tests revealed that VAR was used in 66% of matches in the 2019–2021 season of the CSL. There were significant differences in penalties ( p < 0.01, η2 = 0.11), shots ( p < 0.05, η2 = 0.03), shots in the penalty area ( p < 0.01, η2 = 0.01), fouls ( p < 0.01,η2 = 0.02), passes ( p < 0.01,η2 = 0.05), free kicks (p < 0.05, η2 = 0.01) yellow cards ( p < 0.01, η2 = 0.02) and red cards ( p < 0.01, η2 = 0.05), but there were no significant differences in the number of goals ( p > 0.05), crosses ( p > 0.05) and tackles ( p > 0.05). Therefore, VAR intervention was frequently applied in the CSL during the 2019–2021 season, and the VAR interventions had various impacts on performance indicators.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.