The significance of exercise method on forehand and backhand groundstroke skills improvement in tennis. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran, [S. l.], v. 6, n. 1, p. 132–144, 2020. DOI: 10.29407/js_unpgri.v6i1.13920. Disponível em: https://ojs.unpkediri.ac.id/index.php/pjk/article/view/13920. Acesso em: 9 mar. 2025.