The effect of Keeler’s model on the development of motor flexibility and learning to serve in tennis. Journal of the College of Basic Education, [S. l.], v. 29, n. 122, p. 329–313, 2024. DOI: 10.35950/cbej.v29i122.11114. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/11114.. Acesso em: 5 may. 2025.