Al Khalili, Mohaned, and M.E. Stepanova. “FEATURES OF INDICATORS OF HIGH-QUALIFIED TENNIS SERVICE ACCEPTANCE AT US OPEN 2020, ATP FINAL TOURNAMENT 2020 AND AUSTRALIAN OPEN 2021”. Theory and Practice of Physical Culture, no. 7 (August 19, 2022): 17–20. Accessed March 10, 2025. http://tpf1610220.nichost.ru/index.php/TPPC/article/view/277.