Aggression is an important psychological component that cannot be overlooked when it comes to increasing physical performance, particularly in invasion sports. This research was conducted with the intention of determining the extent of the violent behavior exhibited by the female national netball and volleyball players belonging to Sri Lanka. For the purpose of this study, fifteen female volleyball players and ten female netball players from national teams participated. The data was collected through the use of a standardized and systematic questionnaire, and the findings were analyzed through the application of statistical analysis using SPSS. A two-sample t-test and descriptive statistics were utilized in order to conduct the analysis of the data. The study found that the mean aggressiveness scores for the two national teams were 84.06 and 88.9, respectively. These values were based on aggression. According to the findings of the study, the levels of hostility exhibited by the female players on the country's national teams for netball and volleyball did not differ substantially from one another (p-value = 0.577). According to the findings of the study, the levels of aggressiveness exhibited by both teams were satisfactory, and there was no obvious difference in the levels of aggression exhibited by the female national members of Sri Lanka's netball and volleyball teams. An examination of the psychological situations of athletes and the implementation of strategies to optimize player psychology in order to increase athletic performance are both highlighted by the findings, which show the relevance of these two aspects.