LONDON (AP) — Jannik Sinner was treated for a painful right elbow by a trainer at Wimbledon during a medical timeout in the second set while trailing in his fourth-round match against Grigor Dimitrov on Monday.

The No. 1-ranked Sinner was given a pill to take and received a massage at a changeover while down 3-2 in the second set at Centre Court. Sinner hadn't dropped a set in the tournament until Monday's opener, which No. 19 seed Dimitrov took 6-3.

Dimitrov went on to win the second set, too.

Sinner was hurt when he slipped and fell behind a baseline, bracing his fall with his right hand while still holding his racket.

As the trainer rubbed the elbow, Sinner winced. His coaches, Darren Cahill and Simone Vagnozzi, looked on from their box with concern.

Sinner entered Monday having lost a total of just 17 games in the tournament, tying the record for the fewest in the Open era by a man at Wimbledon through three completed matches.

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AP tennis: https://apnews.com/hub/tennis