602 comments. One under-14 player. Zero context. From one warm-up clip, strangers diagnosed an injury, condemned her coach and predicted the limits of her career all because her grip did not match their preferred technical model. But what do we actually know? We do not know her injury history, whether she experiences pain, how she performs in competition or whether her grip and movement adapt to different balls and situations. Research shows that different grips create different muscular and loading demands. It does not prove that this individual player will become injured. Tagliafico et al. (2009) found associations between grip types and different locations of wrist injury. Dong et al. (2024) found different muscle-activity and impact-loading patterns between Eastern and Western grips. Neither study supports diagnosing a child from a short video. A player-centred coach would assess function before prescribing change: Can she adapt to different balls? Can she attack, neutralise...