Jelena Jankovic suffered a fitness scare ahead of the Australian Open after picking up a thigh injury while playing in the Hopman Cup in Perth.
Jankovic went to hospital for a scan on her thigh injury
The Serbian was retired from her singles match against France's Tatiana Golovin on Thursday, and did not play against Serena Williams on Friday.
She continued to play mixed doubles in the team event but admitted it was only because she was playing for Serbia.
"I shouldn't be here, I am really risking my career," she said.
"I shouldn't be playing but I love playing for my country and I will just try the best I can."
With the Australian Open due to start on 14 January, the 22-year-old admitted that her lack of preparation after a nose operation at the end of last year meant she had arrived in Australia below full fitness.
"I am not really ready," she said. "I only had two weeks before I came here so obviously my body is not in the best shape and the best form.
"I need to do a lot of work to get to where I want to be, to where is my limit and where is my potential. Right now I'm not really feeling that great. I am not really that fit. It's unfortunate that I got this muscle strain.
"I think I recover quite fast and that's something that's good for me. I will try to do my best to be in good shape. I am really hungry to play matches. I want to be in the best form for the Australian Open."