LONDON (AP) — Aryna Sabalenka was having a hard time dealing with her Wimbledon quarterfinal opponent's unusual game style. The mistakes were mounting Tuesday. The stress was rising. The deficit was troubling.

As things went awry, Sabalenka would look at her box with a quizzical expression and raise her hands. After missing one forehand off a short ball, she knelt on the grass near the net, the very picture of exasperation. A month after her loss to Coco Gauff in the French Open final, Sabalenka knew she needed to keep her emotions in check and straighten out her strokes.

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