The research aimed to identify the effect of a program using the mental strategy on directing muscle tension to improve the basic skills in tennis (forward serve - straight front kick - straight back kick) for third year students. A sample of (40) students, then the researcher withdrew a sample of the exploratory study numbering (10) students to conduct scientific transactions for the tests used, and thus the basic research sample becomes (30) students who were divided randomly into two experimental groups and applied to them (using the proposed mental strategy), And a female control officer to whom the method used in teaching is applied (verbal explanation and performance of the practical model), each of whom is (15) female students. Among the research tools: the Rstamitr device for measuring height (in centimeters) and weight in kilograms. This device was calibrated before and during its use - a stopwatch to measure - a legal tennis court - tennis balls. The researcher used the statistical treatments used: arithmetic mean - standard deviation - skew coefficient - correlation coefficient - t-test - improvement ratios. Among the most important results: • The traditional method (verbal explanation and practical model performance) contributed in a positive way to improving basic skills in tennis at a lower rate compared to the experimental group. • The percentage of improvement of the experimental group was superior to the control group in the level of mental strategy (thinking about the skill duty - positive self-talk), directing muscle tension and basic skills in tennis under study. Among the most important recommendations: • Conducting other similar studies in tennis on other strategies, skills and other age stages. • The necessity of including the mental skills in question during training on tennis skills because of their positive impact on developing the level of performance.