Playing a more aggressive style, former No. 1 Caroline Wozniacki dropped just one game against Sara Errani, advanced to the US Open semifinals and took another step toward her first career Grand Slam title.
There will be eight different Grand Slam finalists this year, so women's tennis is as wide open as it's been in decades. History says someone will emerge to take over from Serena Williams, but who that will be isn't at all clear.
The upset bug just kept biting and biting and biting in the women's draw at the US Open. And while there are two former Grand Slam champions remaining in the final eight, the other six are itching to get a breakthrough. Get to know the contenders.
With mentor Martina Hingis cheering from the stands, 17-year-old Belinda Bencic became the youngest US Open quarterfinalist since Hingis herself in 1997, defeating ninth-seeded Jelena Jankovic in straight sets.
Back in the Round of 16 at a major for the first time since 1999, the 32-year-old Mirjana Lucic-Baroni is appreciating tennis like never before as she heads into Sunday's US Open showdown against Sara Errani.