For years, I’ve trained athletes to sharpen their reaction time using one of the simplest tools in the toolbox — a tennis ball. One of those athletes was Luke Kuechly, one of the greatest linebackers to ever play in the NFL, whom I had the privilege of training for six seasons. Today, you see skill players across the league using tennis balls as part of their pregame warm-up routine. In this article, I break down why this method works, how it elevates on-field instincts, and why a small, unpredictable bounce can translate into big-time performance. 🎾#sportsperformancetraining d1training.com/article/coachs-corner-how-using-tennis-balls-trains-hand-eye-coordination