Jannik Sinner admitted he is “lucky” to remain in the Australian Open after the cramping two-times defending champion benefited from a suspension in play as the intense heat reached 38C.

The Italian world No2 was suffering from severe cramps in his legs and left arm and was a break of serve down in the third set when the Australian Open’s “heat rule” was invoked, meaning play was suspended while the Rod Laver Arena roof was closed and Sinner was allowed a ten-minute off-court break. At this stage he was unable to serve or move effectively against the world No85 Eliot Spizzirri. It was at this point that all play on outside courts was suspended until the scorching heat had dropped to closer to 25C.

“Yeah, got lucky today. I started to cramp a little bit in the third set, which after time went slowly away,” Sinner, who won 4-6, 6-3, 6-4, 6-4, said.

The tournament’s heat stress scale measures: radiant heat (the strength of the sun); air temperature in the shade; humidity and wind speed. The scale ranges from 0 to 5. The scale hit 5.0 as Sinner was 3-1 down in the third set. When he returned he looked more comfortable, having taken medication, and broke straight back.

“I know my body slightly better now with a bit of experience also, you know, trying to handle certain situations a bit better,” Sinner, 24, said. “At the point when they closed the roof, it takes a little bit time. Tried to loosen up a little bit. It helped. Changed a bit also the way of how to play certain points. That helped me today, for sure.

Visitors to Melbourne Park were advised to make use of the mist tunnels, water machines and sun umbrellas. Play had started at the earlier time of 10.30am because organisers were aware of the forecast. The Australian Bureau of Meteorology had issued a severe heatwave warning.

2026 Australian Open - Day 7

Sinner had been in clear discomfort but looked more at ease after the break

JAMES D. MORGAN/GETTY IMAGES

When asked what he did in the ten-minute off-court break Sinner said: “Nothing. I was alone. There was no treatment. You cannot have treatment in that time. So I was stretching. I laid down for five minutes, trying to loosen up the muscles.

“It worked really well. Trying to get the body temperature a bit more down. That’s it. There are not many things you can do. Time passed quite fast, but it helped me, for sure. There is a room next to the court when you go out, there’s just a treatment bed, and that’s it, so…

2026 Australian Open - Day 7

Fans have been urged to keep cool at the tournament

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“Today with the rule helped me. I had also the ten minutes after the third set.”

Last year at Wimbledon Sinner was two sets to love down against Grigor Dimitrov before the Bulgarian was forced to retire injured.

Temperatures are expected to hit 40C on Tuesday. The other side of the draw — Carlos Alcaraz’s side — are set to play on this day.

Osaka withdraws through injury

Naomi Osaka has pulled out of the Australian Open before her scheduled third-round match on Saturday due to injury.

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Osaka said her withdrawal “breaks my heart”

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Osaka, the Japanese No16 seed who won the 2019 and 2021 tournaments, said on social media that her body needed attention following her previous match against Sorana Cirstea, without elaborating on the issue. Her opponent, the Australian Maddison Inglis, has a walkover into the fourth round.

“I’ve had to make the difficult decision to withdraw to address something my body needs attention for after my last match,” she wrote. “I was so excited to keep going and this run meant the most to me, so having to stop here breaks my heart but I can’t risk doing any further damage so I can get back on the court.”

The withdrawal is a setback for Osaka, who has been returning to her best and made the US Open semi-finals last year.

At Melbourne Park, Osaka made a huge splash before her opening match against Antonia Ruzic when she entered Rod Laver Arena in a jellyfish-inspired outfit, one of the boldest fashion statements seen at a grand slam.