BEIJING, Oct. 2 -- World number five Li Na became the biggest 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.

Li, who broke up with her Danish coach Michael Mortenson after staging a string of disappointing results since being crowned as French Open champion, still cut a sorry figure on home court under the guidance of her husband coach Jiang Shan.

Li meant her words in the pre-tournament press conference the previous day, saying that the main draw was never easy although her rivals in the first two rounds are either qualifier or wild card player.

The second set proved a torture for the crowd standing in the cold and Li herself, the first Chinese to win a Grand Slam trophy. She was horribly out-of-form and her game become ugly with comitting many grave mistakes and looking like she never wanted to win. In the most humiliating way of losing a match, Li dropped the set at love.

Samantha Stosur from Australia will benefit a lot through Li's defeat as the newly crowned U.S. Open winner is heading to a possible fourth round clash and now the world number six stays much more comfortable in her zone.

In the newly built National Tennis Stadium with a capacity of 15,000 fans, the Romanian qualifier did not have stage fright but the 29-year-old Li looked shaky.

The start of the match was unexpectedly a lopsided one, with Li failing to hold her first three serves and trailing 5-1 against her much lower ranked opponent.

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