Öztürk, B., Büyüktaş, B., Bahçivan, İbrahim, Balikçi, M. and Sangün, L. 2023. Concurrent validity of the athla velocity application for measuring tennis service ball velocity. Journal of Human Sport and Exercise. 18, 3 (Jul. 2023), 701–708. DOI:https://doi.org/10.14198/jhse.2023.183.16.