Alarming moments unfolded at the Cincinnati Open on Monday when Arthur Rinderknech suddenly collapsed during his match. It’s in the same tournament Danielle Collins suffered a meltdown.

Multiple competitors have been battling the sweltering conditions since the tournament began last week, with Monday’s temperatures soaring to 32 degrees celsius. Rinderknech had lost the opening set of his third-round clash against Felix Auger-Aliassime but managed to secure an early break in the second set.

Following Auger-Aliassime’s successful break back to even the score at 2-2, Rinderknech slowly made his way to the baseline to retrieve a towel and tried to sit down, ultimately collapsing onto his back. Elsewhere in the tournament, Daniil Medvedev’s outburst turned heads.

Despite continuing to compete, he failed to claim another game and eventually withdrew, sending the Canadian through to the round of 16. The broadcast initially focused on No. 23 seed Auger-Aliassime as he prepared for his service game after breaking Rinderknech.

However, a disturbance erupted on the opposite end of the court, with the umpire audibly asking: “Arthur, are you okay?”.

Auger-Aliassime spotted his fallen opponent and quickly rushed over to assist, carrying a towel with him.

The umpire followed suit, and medical personnel promptly entered the court as Rinderknech remained on the ground, providing him with ice. Television coverage briefly shifted away and displayed crowd shots while Rinderknech received medical attention.

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He ultimately rose to his feet and resumed play but dropped the game, then received additional care from the trainer during the changeover.

After it became apparent that the world No. 70 could continue competing, Sky Sports aired replays of the troubling incident.

“This is Arthur Rinderknech just collapsing at the back of the court. Medical team came on to assist him. This is a match involving Felix Auger-Aliassime. They’ve been on court for just shy of two hours, an hour and 53 minutes,” Gigi Salmon told viewers.

“He was then treated back at his chair. You can see the man trying to figure out the air conditioning unit. Worrying scenes, signs and times. That’s the ice towel that he will put anywhere and everywhere to try and cool himself down.”

The French player, who had shocked No. 11 seed Casper Ruud in the earlier round, lost his serve in the following game and withdrew from the match with Auger-Aliassime ahead 7-6(4) 4-2.

Salmon continued: “Arthur Rinderknech, who just a short while ago collapsed at the back of the court, was not able to continue. Before that point, he leant down, his hands on his knees, almost bent double, barely able to move right now.

“It’s really difficult to see. These are such tough conditions. [When he was] sat down on his bench, he had an ice towel around his neck, he had an ice towel on his legs, and we just hope he recovers quickly.”