Jannik Sinner avoided the fate of his top rivals, reaching the fourth round of the U.S. Open while fellow top seed Iga Swiatek gained momentum in her quest for a sixth Grand Slam title after a pep talk from Serena Williams on Saturday.

With defending champion Novak Djokovic forced out by a shock loss to Alexei Popyrin in the third round on Friday and another title contender, Carlos Alcaraz, sent crashing by Botic van de Zandschulp in round two a day earlier, all eyes were on Sinner.

The Italian, who has managed the intense scrutiny following a doping controversy in the build-up to the tournament, thumped Christopher O’Connell 6-1 6-4 6-2 to underline his credentials as the outright favourite at the year’s final major.

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“This sport is unpredictable, no? Whenever you drop a little bit of your level, you know, if it’s mental, if it’s tennis-wise or physical, at the end it has a huge impact on the result,” Sinner said about the exits of Djokovic and Alcaraz.

“Both opponents who they lost against played incredible tennis. And it happens.

“So I just watch on my side what I have to do, you know, that I guess I’ve done, and then we’ll see what I can do.”

Up next for the Australian Open champion is Tommy Paul, who is among a group of players keen to end a 21-year American wait for a homegrown major winner, since Andy Roddick claimed the title in New York.

Also Read: US Open 2024: Defending champion Novak Djokovic faces shock loss against Alexei Popyrin

Paul, the 14th seed, recovered from a first-set wobble to overcome Canadian Gabriel Diallo 6-7(5) 6-3 6-1 7-6(3) and hoped to counter Sinner’s “bang-bang tennis” when they clash.

“He’s probably the best ball striker on tour and I’m not,” Paul said. “I don’t want to go toe to toe just banging on the baseline with him. I want to try and mix things up.”

Paul’s compatriot and sixth seed Jessica Pegula advanced in the women’s draw with a 6-3 6-3 win over Jessica Bouzas Maneiro, but Ashlyn Krueger fell 6-1 6-1 to Liudmila Samsonova.