In the women's quarterfinals, Cibulkova earned a spot against U.S. Open champion Sam Stosur, who ended 19-year-old unseeded American Sloane Stephens' best Grand Slam run 7-5, 6-4. No. 21 Sara Errani of Italy beat two-time major champion Svetlana Kuznetsova 6-0, 7-5, setting up a match against No. 10 Angelique Kerber of Germany, a 6-3, 7-5 winner over unseeded Petra Martic of Croatia.
Azarenka's loss means that Maria Sharapova, scheduled to play her fourth-round match Monday, can move up to No. 1 in the rankings by reaching the final.
Asked what went awry, Azarenka replied: "Pretty much everything, really. I don't know how to describe my performance, really, today. It wasn't satisfying at all. ... But I guess it happens."
Even to the best of the best.
Federer found the wind troubling on a day the temperature was in the 60s, but he made sure to compliment Goffin.
"He's got great potential in terms of his touch and the way he reads the game," Federer said. "I'm impressed."
Whatever happens for the rest of Goffin's tennis career, no matter what life has in store, he'll always be able to say he got to play against his favorite player, one of the greatest in history — and took a set off him, no less.
Goffin will always have this day.
"I will never forget this moment," Goffin said. "I hope I will have a lot of moment like this."
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