Kim Clijsters will wait until next week before deciding whether or not to resume training and take part in this month's Australian Open.
The Belgian's hopes of participating in the opening grand slam of the year suffered a blow yesterday when she hobbled out of a warm-up event with an ankle injury.
Clijsters injured her left ankle during a Hopman Cup match against Australia's Alicia Molik at the Burswood Dome in Perth. She was taken to hospital in the west Australian city for an MRI scan.
The medical report said: "Because of the specific form of strain, there is a swelling as well as an inflammation in the heel around the back of the ankle joint."
A statement on Clijsters' website said: "Only when the swelling has diminished will it be clear what really is the matter.
Jelena Dokic is also unlikely to play in this month's Australian Open, after withdrawing from the adidas International in Sydney.
She had already scratched from this week's Auckland tournament - citing "personal reasons" - but was expected to play in the traditional grand slam warm-up event which starts in Sydney this weekend.
Instead, she has announced her withdrawal because of a lack of fitness.