Sánchez-Alcaraz Martínez, Bernardino Javier, Javier Courel-Ibáñez, Alejandro Sánchez-Pay, and Samuel García Cambronero. 2018. “Differences in Service and Return in Top 8 Men and Women Ranking”. ITF Coaching & Sport Science Review 26 (76). London, U.K.:17-19. https://doi.org/10.52383/itfcoaching.v26i76.159.