The move comes just weeks after her Australian Open triumph.
After some debate, the Scot decided to undergo hip resurfacing surgery.
The Serbian tennis star had the room in hysterics.
The Serbian tennis number one beat Rafael Nadal in straight sets.
Naomi Osaka is the first Japanese to become world tennis number one.
Some players' talk matches their on-court ability, writes Dave Worsley.
The Spaniard will face either Novak Djokovic or Lucas Pouille in the final.
The winner of the final will become the new world number one.
Tennis players have some very odd superstitions, writes Dave Worsley.
The Serbian eased through as Kei Nishikori had to withdraw with injury.
The Frenchman took poor form in the Aussie Open - but hasn't looked back.
The American tennis legend capitulated in her Australian Open quarter-final.
Let's give the Aussie 'bad boy' credit for the good things, says Dave Worsley.
The Czech put an end to Ashleigh Barty's fairytale run at the Australian Open.
The Spanish great booked another semi-final spot with a straight-sets win.