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Coaching to Improve the Accuracy and Effectiveness of Junior Tennis Players’ Shots in the Special Region of Yogyakarta Through the Integration of Training Using a Ball-Launcher and Conventional Training. Resocia [Internet]. 2026 Oct. 20 [cited 2026 Nov. 12];1(4):153-66. Available from: https://researchfrontiers.id/resocia/article/view/361