DEVELOPMENT OF IA TRAINER LEARNING MEDIA BASED ON ANDROID APPLICATION TO IMPROVE GROUNDSTROKE ABILITY OF BEGINNER TENNIS PLAYERS. - AKSIR, MUH. ILHAM; SUHERMAN, WAWAN SUNDAWAN; ALIM, ABDUL; HASMYATI; SYAFRUDDIN, MUHAMMAD AKBAR; PRASETYO, YUDIK; SUSANTO (Sports Science & Health / Sportske Nauke i Zdravlje, 2025)