The Trott and KP conundrum

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Firstly, he has been getting too low in his stance at the crease. He is bending his knees too much. In any game played with a moving ball, it is crucial to keep the head and the eyes still. In cricket a batsman needs to keep his gaze as parallel to the ground as possible. Because Pietersen is dropping so low, he has to rise up again as the ball is coming at him. His eyes are travelling in the opposite direction to the trajectory of the delivery, moving up as the ball is coming down. This is affecting his ability to properly judge line and length.
Kanishkaa Balachandran is a senior sub-editor at ESPNcricinfo