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 quarterfinals. 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.




Russian star Maria Sharapova survived a major scare before dousing the challenge of Italy's Karin Knapp in intense heat to reach the Australian Open third round Thursday. 