This research was carried out to determine the effects of tennis training applied during the preparation period on some physical parameters of the athletes. The research group consists of 24 male volunteer athletes licensed in the tennis branch. Athletes in the research group were trained for endurance and tennis, three days a week and 85 minutes a day for eight weeks. Height, body weight, leg strength, hand grip strength, vertical jump, speed, flexibility and agility values were measured for the research group at the beginning and end of the training. SPSS statistical package program was used in the analysis of the data. Significance was accepted as p>0.05. As a result of the research, tennis players; It was determined that there was a statistically significant difference between the leg strength, hand grip strength, vertical jump, flexibility, agility, ten and thirty meters values (p<0.05). As a result, it has been seen that regular and planned tennis and endurance trainings during the preparation period affect the physical parameters of the athletes positively. In this context, it is thought that if the trainings to be applied at early ages are designed considering the physical characteristics of the athletes, they will positively affect the performance of the athletes.