Defending champion Jannik Sinner was left on the verge of physical collapse as extreme heat triggered one of the most contentious moments of the Australian Open on Saturday.
Officials were forced to suspend play on outside courts and close stadium roofs as Melbourne Park baked under brutal conditions.
With temperatures surging towards 38–40°C on day seven of the tournament, the Australian Open’s extreme heat stress scale passed the critical 5.0 threshold at around 2.30pm AEDT.
Tournament officials immediately halted all matches on outside courts and ordered the roofs closed on Rod Laver Arena, Margaret Court Arena and John Cain Arena, leaving only limited play possible in climate-controlled stadiums.
‘Please be advised that due to the heat, no matches will be called on outside courts before 5.30pm AEDT,’ Tennis Australia announced, as spectators were urged to seek shade and apply cooling strategies.
The timing of the suspension proved pivotal for Sinner, who was physically unraveling during his third-round match against American world No.85 Eliot Spizzirri.
Australian Open champion Jannik sinner held on for a gutsy fourth-round win after battling the heat at Melbourne Park
Sinner was clearly struggling as the mercury soared to 40 degrees, which would have been amplified on the court
Officials funneled air-conditioning to the players in a bid to help them cool down in between points
The two-time champion had already dropped the opening set and was down a break in the third when his movement deteriorated dramatically, prompting visible concern from commentators, officials and fans alike.
‘Jannik Sinner has never been more relieved to come off the court,’ Brenton Speed said in commentary for Nine.
‘What an incredible story this is.’
Sinner’s distress was impossible to ignore.
He received a time clock violation after struggling to reach the baseline to serve, pointed to his left leg while speaking with the trainer, and required repeated medical attention as cramps appeared to spread through his body.
Todd Woodbridge suggested the signs were ominous.
‘He pointed to his left leg when he mentioned it to the trainer … that’s where the treatment is applied right now,’ Woodbridge said.
‘In my experience with cramps, they always started down in the bottom of my calf and then worked way up.’
During the third set, Sinner was clearly in distress with cramping and was unable to walk properly
Sinner looked on the brink of retiring from the match before the decision was made to close the roof of Rod Laver Arena
Sinner receives treatment in a desperate bid to stay in the match and keep his Australian Open aspirations alive
Moments later, Sinner cramped again.
‘He’s getting cramp, his hand just went, his finger just went and his thumb … he might be in a bit of trouble here,’ Woodbridge added. ‘This is quite troubling.’
Sinner’s team were acutely aware of the danger. His coach Darren Cahill could be heard urging him courtside: ‘Just go point by point, dig deep.’
As the heat stress scale climbed, Sinner sat through changeovers with multiple ice packs, using a personal air-cooling unit while attempting to loosen his muscles.
At one stage, Woodbridge accused the Italian of mentally ‘tapping out’ during a point in the opening set, calling an uncharacteristic drop shot an ‘awful’ decision and saying it was ‘unheard of’ for Sinner to struggle so badly on serve.
Spizzirri, sensing opportunity, worked to extend rallies and keep Sinner exposed to the sun.
The American led 3–1 in the third set when play was finally suspended, with many believing Sinner was minutes away from being forced to retire. The intervention changed everything.
After a break of roughly 10 minutes and the roof closing on Rod Laver Arena, Sinner returned moving far more freely. He immediately broke back, steadied himself and eventually completed a four-set escape, winning 4-6, 6-3, 6-4, 6-4.
The decision to close the roof at Rod Laver Arena came as the heat index climbed to 5.0
Australian Open officials installed misting fans around Melbourne Park to help fans cool off
‘Who knows what might have happened if play in that third set had continued for another 10–15 minutes,’ Woodbridge said on Nine after the match.
The Australian Open’s heat stress scale – which factors in radiant heat, humidity, air temperature and wind speed – allows for a 10-minute break between sets once level four is reached.
At level five, play must be suspended on outside courts or moved under closed roofs. Officials confirmed the scale had exceeded 5.0 as temperatures soared across Melbourne Park.
Extreme heat has troubled Sinner before. During last year’s tournament, he appeared to suffer heat exhaustion in a fourth-round match against Holger Rune but still managed to win in four sets.
On Saturday, however, the scenes were more confronting.
The stoppage sparked fierce debate online, with fans accusing tournament organisers of handing Sinner a lifeline.
One social media user wrote: ‘Sinner. What an escape in that third set. Heat rule saved him, can’t lie.’
Others claimed the momentum had been unfairly stripped from Spizzirri, who had appeared in control.
Officials had anticipated delays, bringing play forward by 30 minutes as the Bureau of Meteorology forecast a top of 40°C later in the day.
Even so, the heat intensified rapidly, with the stress scale jumping from 3.2 just after midday to above five within hours.
Australian No.1 Alex de Minaur acknowledged the toll the conditions would take, saying players needed to hydrate constantly, use ice towels from the opening game and prepare to feel uncomfortable.
‘Sometimes that’s part of tennis,’ he said.
‘It’s one of the factors that play into this beautiful game that we have.’
