The Relationship Between Concentration, Achievement Motivation, and Academic Stress in Tennis Student Athletes. Compet. J. Pendidik. Kepelatihan Olahraga [Internet]. 2025 Feb. 28 [cited 2025 Jul. 19];17(1):160-8. Available from: https://competitor.ojsunm.ac.id/index.php/competitor/article/view/182