Jo-Wilfried Tsonga of France survived a first-round scare as the top seed was stretched to two tight games by unheralded Grigor Dimitrov of Bulgaria before concluding the match 7-6(5), 7-5 on Tuesday.
Reigning champion Caroline Wozniacki of Denmark cruised into the third round of 2011 China Open after battling past Jarmila Gajdosova of Australia in straight sets on Tuesday.
Denmark's world No. 1 Caroline Wozniacki recovered a sluggish start to beat Czech player Lucie Hradecka for the second round at the China Open while Italy's seventh seed Francesca Schiavone became major seed casualty on Monday.
World number five and French Open winner Li Na became the sole seed casualty in the opening round of the China Open on Sunday, slumping to a 6-4, 6-0 defeat to the unknown Romanian qualifier Monica Niculescu.
World No. 2 Maria Sharapova and former top player Serena Williams pulled out of the China Open on Friday, one day before the beginning of the WTA premier event.