Body composition and shape according to ideal Body Mass Index (BMI) conditions are crucial factors for tennis athletes to reach high performance and avoid the risk of injury. This study aimed to determine the correlation between Body Mass Index (BMI) and the injury rate in tennis courts athletes in Banyumas Regency. The research instrument used a body mass index (BMI) and Functional measurement test. The measurement profile is strengthened by the athlete's injury archives data using an injury questionnaire. The research method uses the Correlational method. Data analysis used normality test, linearity test, and correlation test to comprehend the level of relevance between Body Mass Index (BMI) and the prevalence of injury in tennis athletes. Identification of Body Mass Index (BMI) and risk of injury in tennis athletes is essential for coaches to design an accurate training program for athletes to achieve high performance during training and competitions. The study results are expected to provide information about the importance of the ideal composition of Body Mass Index (BMI) to avoid the possibility of sports injuries caused by excessive body weight.