The research aims to effect of repetitive speed training on some physical and skill variables for tennis juniors under14 years . The researchers used the experimental method and suitability to the type and nature of this research , through experimental design using pre- and post- per one group . The researchers selected sample in a deliberate manner from Grand Slam Tennis Academy, the sample consisted of (9) juniors from regular in application of training program, in addition to sample of exploratory studies (8) from the same research community and from outside the basic research sample . The researchers did two questionnaire studies in period from Monday 4/8/2025 to Wednesday 13/8/2025 in order to ensure accuracy in the results extracted from the basic study sample measurements and the calculation of the scientific tests for the tests (honesty - stability) . The researchers applied training program using repetitive speed training from Saturday 16/8/2025 to Wednesday 8/10/2025, for a period of (8) weeks, and the existence of (3) training modules per week are Saturday, Monday, Wednesday of each week . and the most important results training program using repetitive speed training positive impact on some physical and skill variables for tennis juniors under14 years . and the most important recommendations apply training program using repetitive speed training because of its effective on development of some physical and skill variables for tennis juniors under14 years .