MURHIJ, A. J. The Mediating Role of Self-Confidence in the Relationship Between Mental Toughness and Performance in Handball . Academia Open, [S. l.], v. 11, n. 2, p. 10.21070/acopen.11.2026.15631, 2026. DOI: 10.21070/acopen.11.2026.15631. Disponível em: https://acopen.umsida.ac.id/index.php/acopen/article/view/15631. Acesso em: 6 oct. 2026.