Thamr A, Abdul Abbas H. THE STARTING ANGLE OF THE BALL AND THEIR RELATIONSHIP WITH THE TWO ANGLES FALL AND REBOUND THE BALL OF TOPSPIN SERVE FOR THE NATIONAL TENNIS TEAM PLAYERS. jope [Internet]. 2015 Sep. 28 [cited 2024 May 7];27(3):62-75. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/611