Widiyatmoko, Fajar Ari, Buyung Kusumawardhana, and Muhammad Nur Ali Imran. 2021. “The Comparison of Elbow Extension and Elbow Flexion Movement Toward Forehand Accuracy of Court Tennis”. Journal Sport Area 6 (1):10-14. https://doi.org/10.25299/sportarea.2021.vol6(1).4229.