Melbourne: Former world number one Ana Ivanovic pulled off a massive upset by beating top seed Serena Williams on Sunday to power into the Australian Open quarter-finals. The Serb came from a set down to win 4-6, 6-3, 6-3, ending Williams' bid to match Chris Evert and Martina Navratilova with 18 Grand Slam titles. (Click here for all the updates on Australian Open)
Williams, who was gunning for a sixth Australian crown, did not appear to be moving freely with unconfirmed reports that she was carrying an injury. She pulled out of the doubles on Friday, although that was blamed on an injury to sister Venus.
It was a major scalp for Ivanovic, 26, and set up a last-eight clash against either Canadian teenager Eugenie Bouchard or local hope Casey Dellacqua. "It's amazing, I just wanted to play the best I could," said Ivanovic. "I'm so thrilled that I played so well. I was very consistent and I'm happy about that." (Also read: Pennetta makes her first Australian Open quarters)