MELBOURNE, Australia (AP) \u2014 Limping and desperately trying to stretch out cramps in his arms and legs, Jannik Sinner had just gone down a break in the third set when the extreme heat rules saved him.<\/p>\n
Play was suspended for eight minutes while the roof was closed on Rod Laver Arena on Saturday afternoon, and the two-time defending Australian Open champion<\/a> returned a revitalized man.<\/p>\n After being on the verge of an unlikely exit \u2014 one of his coaches, Darren Cahill, was urging the 24-year-old Italian just to stick it out for a few more games \u2014 Sinner won five of the next six games to take the set against No. 85-ranked Eliot Spizzirri.<\/p>\n Another 10-minute \u201ccooling break\u201d between the third and fourth sets followed \u2014 an allowance under the extreme heat policy<\/a> \u2014 and Sinner returned for a 4-6, 6-3, 6-4, 6-4 victory that highlighted a dramatic contrast of intense light and shade.<\/p>\n \u201cI struggled physically today. I got lucky with the heat rule,\u201d Sinner said, agreeing that the cooler indoor conditions suited him much more than the energy-sapping heat of the first two sets. \u201cI try to stay calm even in a moment like this. If he keeps playing the way he was playing, maybe I was dropping a little bit, maybe my tournament was over today. I don\u2019t know.\u201d<\/p>\n Spizzirri was magnanimous about it, adding: \u201c That\u2019s the rules<\/a> of the game, and, you know, you got to live with it.\u201d<\/p>\n Djokovic: 1st to 400 <\/p>\n Novak Djokovic<\/a> became the first player ever to notch 400 match wins at the majors<\/a> when he beat Botic van de Zandschulp 6-3, 6-4, 7-6 (4) in a night match.<\/p>\n The 24-time major winner<\/a> improved his win-loss record to 102-10 at the Australian Open, equaling Roger Federer\u2019s career haul for the most-ever match wins at the season\u2019s first major.<\/p>\n Osaka out<\/p>\n Two-time Australian Open champion Naomi Osaka withdrew because of an abdominal injury<\/a> before her scheduled third-round match against Australian qualifier Maddison Inglis, ending a campaign noted strikingly for fashion<\/a> and friction<\/a>.<\/p>\n That sent Inglis into a fourth-round match against No. 2-ranked Iga \u015awi\u0105tek, who had a 6-1, 1-6, 6-1 win over Anna Kalinskaya.<\/p>\n No. 4 Amanda Anisimova beat Peyton Stearns 6-1, 6-4 in an all-American encounter and will next face Wang Xinyu, who upset No. 13 Linda Noskova.<\/p>\n No. 5 Elena Rybakina advanced to a fourth-round match against No. 21 Elise Mertens.<\/p>\n Cheers, Stan<\/p>\n The 40-year-old Stan Wawrinka lost 7-6 (5), 2-6, 6-4, 6-4 to No. 9 Taylor Fritz and then grabbed two beers from a courtside ice box, cracked the cans with the tournament director and bid farewell to the crowd. \u201cCheers everybody!<\/a> \u201d he said.<\/p>\n Fritz will next face No. 5 Lorenzo Musetti, who held off Tomas Machac 5-7, 6-4, 6-2, 5-7, 6-2 to become the third Italian man to reach the fourth round.<\/p>\n No. 8 Ben Shelton beat Valentin Vacherot of Monaco, 6-4, 6-4, 7-6 (5) on Margaret Court Arena and said having the roof closed \u201cjust amplified the noise.\u201d<\/p>\n The 37-year-old Marin Cilic, U.S. Open champion in 2014 and Australian Open runner-up four years later, lost in four sets to father-to-be Casper Ruud.<\/p>\n Good morning<\/p>\n An earlier start than usual<\/a> on Day 7 was no worries for defending champion Madison Keys and Jessica Pegula. No. 9-seeded Keys beat Karolina Pliskova 6-3, 6-3 and No. 6 Pegula defeated Oksana Selekhmeteva 6-3, 6-2.<\/p>\n