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MELBOURNE, Australia — Defending champion Jannik Sinner has defeated 46th-ranked Marcos Giron of the U.S. 6-3, 6-4, 6-2 at the Australian Open. Saturday night's victory moved Sinner into the fourth round at Melbourne Park for the fourth time. He faces No. 13 Holger Rune next. Sinner stretched his unbeaten run to 17 matches, dating to last season. He had an eventful 2024, claiming his first two Grand Slam titles, reaching No. 1 in the ATP rankings for the first time — and going through a doping case that is still not quite resolved, because the World Anti-Doping Agency appealed his exoneration.
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Jannik Sinner of Italy plays a backhand return to Marcos Giron of the U.S. during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 18, 2025. - AP Photo/Asanka Brendon Ratnayake
