Unfortunately for Zheng, it was a bad day to be good

China's Zheng Jie became one of several upsets at the China Open on Monday.

Ranked No 22 in the world, Zheng lost to Spanish qualifier Lara Arruabarrena-Vecino, 6-2, 6-4, to the disappointment of the home crowd in the morning session.

"I started to lose my rhythm after losing two game points and had too many errors," Zheng said. "It's hard to maintain top form for very long. Sometimes, you lose matches that you didn't expect you would. I am happy about my performance this year and the top 30 ranking. But I still expect to improve my serving and it didn't work very well today."