CINCINNATI, USA (AFP) — Third seed Rafael Nadal hit the wall with injury and Olympic fatigue, losing in the third round of the ATP-WTA Cincinnati Masters to Croatian teenager Borna Coric 6-1, 6-3 yesterday.

Nadal, who won gold in the doubles in Rio last weekend, committed 18 unforced errors and four double faults in the first set alone as he joined Stan Wawrinka in making an early exit.

Nadal received treatment to both his left elbow and left ankle after the opening set, while his left wrist, which forced him out of the French Open and to miss Wimbledon, was heavily taped as a precaution.

Coric took complete control as he won 10 games on the trot to lead 4-0 in the second set before wrapping up a crushing victory in 72 minutes.

For Coric, ranked 49th, it was just his second career win over a top-five player and also snapped a 10-match losing streak against opponents in the top 10.

“It was an unbelievable match from my side,” said the Croat. “I played well from the beginning and he was not playing his best tennis.

“I served well and was hoping for some aces. That’s what saved me.”

Second seed Wawrinka slumped to a 6-4, 6-4 defeat to Grigor Dimitrov as the Bulgarian, fighting his way back after a poor season, reached the Cincinnati quarter-finals for the fourth time.

Wawrinka, coming off a back problem which kept him from the Rio Olympics, did not help his own cause with 28 unforced errors and just 11 winners in a contest that finished inside 90 minutes.

Dimitrov, who is playing doubles with Wawrinka this week as the US Open start approaches a week from Monday, stretched his lead in their head-to-head series to 4-2.

Steve Johnson replaced John Isner as the top-ranked American, thanks to a 6-3, 7-6 (8/6) upset of French seventh seed Jo-Wilfried Tsonga. Ninth seed Gael Monfils withdrew with back pain, handing a quarter-final place to Dominic Thiem.

In the women’s third round, 2015 finalist Simona Halep beat Australian Daria Gavrilova 6-1, 6-2, while ninth seed Carla Suarez Navarro beat US Open finalist Roberta Vinci 6-1, 7-5. fifteenth seed Karolina Pliskova stopped Misaki Doi 7-5, 6-3.