Mahmoud S. The Relationship Of Some Kinematical Variables of The Hitting Arm And The Percentage of Contribution In Straight Serving Accuracy In Junior Tennis. jope [Internet]. 2016 Sep. 28 [cited 2024 May 4];28(3):568-83. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1091