See main article: 2011 China Open (tennis).
Agnieszka Radwańska defeated Andrea Petkovic in the final, 7–5, 0–6, 6–4 to win the women's singles tennis title at the 2011 China Open. This was the second consecutive year that the champion in Beijing also won the title in Tokyo.
Caroline Wozniacki was the defending champion, but lost in the quarterfinals to Flavia Pennetta.
The four Tokyo semifinalists received a bye into the second round. They are as follows:
See main article: 2011 China Open – Women's singles qualifying.
