The research aims to design a proposed program using some mental strategies (thinking in the skill duty - positive self-talk) and identifying its impact on: sports confidence (sports confidence as a feature - sports confidence as a case) and psychological skills (ability to relax - mental perception - focus attention ), the level of serve performance in Tennis. The researcher used the experimental method for that, as it is appropriate to the nature of the study using the tribal and dimensional design of two groups, one experimental and the other being controlled. Youngsters were divided into two groups, one is experimental and the other is a control force of 12 players each. The content of the expected program for mental strategies for a period of (8) weeks was applied to the members of the experimental group by (24) training units. After completing the application of the training program in question, the post-leadership of the study sample was performed and statistically processed data then presented and discussed the results. The most important results were the use of mental strategies (thinking in skill duty - positive self-talk) positively affecting psychological skills (mathematical confidence as a feature - mathematical confidence as a case - the ability to relax - mental perception - focus attention). The use of mental strategies (thinking in duty) Skills - Positive Self-Speaking) positively affecting the level of transmission skill performance in the tennis in question. Key words: Mental strategies - Flat Service – Self confidence - Sports confidence