Former world No. 1 Maria Sharapova did not continue her top form as she crashed out of the 4.5 million U.S. dollars China Open WTA tournament on Wednesday. Sharapova, who claimed her first title since returning from a shoulder injury in Tokyo on Saturday, seemed tired and dropped serve four times to lose to Chinese player Peng Shuai 6-2, 6-4 in only one hour and 14 minutes.

Fourth seed Elena Dementieva immediately restored order in the second Russia versus China clash of the evening, rattling through her third round match against Li Na 6-2, 6-0 in just under an hour to move into the round of last eight.

Svetlana Kuznetsova, the 2006 China Open winner, overcame a misfiring serve to claim her place in the last eight with a 6-3, 4- 6, 6-0 victory over Ukraine's Alona Bondarenko.

The sixth-seeded Russian will face compatriot Anastasia Pavlyuchenkova in the quarterfinals after the teenager beat Canadian Aleksandra Wozniak 6-4, 6-4.

Sharapova said: "My energy level was not where it should have been. I have some occasions where I've been able to fight back, today was just not one of those days unfortunately."

"Peng played really solid and really aggressive and did all the right things to win the match."

The 53rd-ranked Peng, who has scored an impressive comeback win over Serbia's No. 8 seed Jelena Jankovic the previous day, will in the quarterfinals face either second seed Serena Williams or Nadia Petrova from Russia.

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