Saturday’s Cincinnati Open semifinal between Carlos Alcaraz and Alexander Zverev was temporarily suspended in the first set after a fan felt unwell in the stands.

The delay lasted around five minutes, as staff members on site at P&G Center Court attended to the fan in distress. The high temperatures have been a talking point throughout the Cincinnati Open, and Arthur Rinderknech collapsed during his Round of 32 clash against Felix Auger-Aliassime.

Iga Swiatek reminded everyone to drink plenty of water after progressing to the semifinals of the women’s draw, but the intense heat remains a concern. On Saturday evening, a heat advisory was in effect for Cincinnati and the surrounding areas.

Temperatures reached 95 degrees Fahrenheit on Saturday, with a zero percent chance of rain and high humidity. Rinderknech failed to finish his match against Auger-Aliassime after he collapsed during the second set.

The score was 2-2 in the second set when Rinderknech collapsed after attempting to walk off the court. The French tennis player later confirmed that he was fine via Instagram, but criticized the GreenSet playing surface.

“I tested the GreenSet hot plate (stovetop) version… Verdict: not a fan at all,” he wrote. “Thanks for your messages, everything’s fine! A large glass of water and we’re off again.”

Auger-Aliassime also explained how hot the court felt and expressed concerns for coaches and spectators in attendance. “It feels like we’re in an oven, even for the fans,” he said.

“We’re always on the move and focused on trying to win, but the crowd is sitting for a long time, and so are our coaches. A friendly reminder to everyone: drink plenty of water, bring hats, and cool off as much as possible.”

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When asked about Rinderknech’s health scare, he added: “From my point of view, it was very sudden. We spoke later, and he told me he didn’t feel well today, right from the start, and it remained that way throughout the match.

“He tried to stay in the fight. For me, winning that first set was key.”

Swiatek responded more lightheartedly when asked how she handles the heat following her quarterfinal win over Anna Kalinskaya on Friday. “There’s no secret; I just drink,” she said, before looking at the camera and adding, “But water!”

“Honestly, I think we kind of need to get used to it with how the world is changing. And it’s going to be worse and worse I guess, so yeah.”

Swiatek will face Elena Rybakina in the semifinal on Saturday. The winner will face either Veronika Kudermetova or Jasmine Paolini.