Effectiveness of Tennis Ball Dropping Machine in Improving Forehand and Backhand Training for Tennis Court Athletes in West Tanjung Jabun. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, [S. l.], v. 17, n. 2, p. 1935–1942, 2025. Disponível em: https://competitor.idjournal.eu/index.php/competitor/article/view/8. Acesso em: 19 mar. 2026.