After losing in the first round of Beijing, Agnieszka Radwanska says she is ending her season due to a stress fracture in her foot and may not be ready for the Australian Open

"I'm done for this year with a very serious injury, a stress fracture," said Radwanska. "It's a complicated injury and there's some chance it won't be healed in time for Australia.

"I just realized how serious the injury was just before I came to Asia to play in Tokyo and Beijing."