That high, almost casual forehand finish beside the head is not casual at all. It is a biomechanical insurance policy that top players cash on every heavy rally ball, using angular momentum and joint alignment to make violence look routine.
The core idea is blunt: the finish goes high because the racket has already gone low. A modern forehand traces a steep, vertical racket path, from below the ball to well above it, to maximize topspin through the Magnus effect and a high angular velocity about the shoulder. Ending with the racket on the right side of the head keeps that path continuous, so the face does not flip open or closed late, which would spray the ball. Short follow-throughs might look aggressive. They are biomechanical dead ends.
Safety, not style, locks the pattern in. When the arm finishes across and high, the humerus, scapula, and wrist move in a coordinated kinetic chain rather than stalling in front of the body, which would dump stress into the medial elbow and rotator cuff. The so-called windshield-wiper action, driven by forearm pronation and internal rotation of the shoulder, can then decelerate over distance instead of braking on impact. One fluid arc. Spin, control, and joint health, all bought with the same swing.
