Britain's Andy Murray has had hip surgery in Melbourne and says he hopes to be playing again in time for this summer's grass-court season.
The former world number one, 30, has not played a competitive match since he was knocked out of Wimbledon in July.
The ongoing problem forced the Scot to pull out of the Australian Open, which begins on 15 January.
"I'm not finished playing tennis yet. I'm going to be competing at the highest level again," he said.
"I'm very optimistic about the future - the surgeon is very happy about how it went.