Upset for Ivanovic in Japan

Ana Ivanovic's late-season slump continued today as she suffered a 6-1 1-6 6-2 defeat by Russian Nadia Petrova during their second-round match at the Pacific Open.

The world's third-ranked player, Ivanovic has been off-key since winning her first Grand Slam title at the French Open in June. The Serb was ousted in the third round at Wimbledon before suffering a similar fate in Montreal.