TENNIS star Arthur Rinderknech collapsed on court during his match with Felix Auger-Aliassime at the Cincinnati Open.

Players have struggled with the intense heat at the event so far this tournament.

During Monday's play, temperatures in Mason, Ohio - where the tournament takes places - soared as high as 32C.

Rinderknech and Auger-Aliassime had played a tight first set, with the Canadian pinching it in a tiebreak.

With Auger-Aliassime about to serve at 2-2 in the second set, Rinderknech fell down.

The Frenchman had been trudging towards the back of the court.

After grabbing a towel from a ballboy, Rinderknech wiped his face before sinking to the ground.

As the 30-year-old lay on his back, breathing deeply, both Auger-Aliassime and the umpire jogged over to check whether he was okay.

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