Three-time Grand Slam champion Andy Murray is in hospital after undergoing hip resurfacing surgery.
The former British number one announced in January he would retire this year, preferably after Wimbledon.
But he admitted the Australian Open, where he lost to Roberto Bautista Agut in the first round, could be the final tournament of his career.
Murray, 31, said on his social media page: "I have a metal hip. Feeling a bit battered and bruised but hopefully that will be the end of my hip pain."
Murray initially had surgery on his right hip in January 2018 and has played 15 matches since returning to the sport last June.