'I am spent': World number one Barty retires at 25

Australia's world number one Ash Barty has retired at the age of 25 and at the peak of her game, citing the fulfilment of her tennis goals and fatigue with life on the Tour.

She quits with 15 titles, less than two months after winning the Australian Open, her third Grand Slam singles triumph following Wimbledon in 2021 and the 2019 French Open.

"I know how much work it takes to bring the best out of yourself ... I don't have that in me anymore," she said in a video posted on her Instagram account on Wednesday.

"I don't have the physical drive, the emotional want and everything it takes to challenge yourself at the very top level any more. I am spent."

It marks Barty's second retirement from the sport, having walked away from the game as a teenager in late-2014 after becoming disaffected by the Tour.

She returned in 2016 and rose rapidly up the rankings, earning global acclaim for her brilliant tennis and fans' affection for her unfailing good sportmanship and laid-back demeanour.

She spent a total of 121 weeks as world number one and appeared destined for more success in the game's biggest tournaments.

However, she never made any secret of her dislike for the touring life and her battles with homesickness.

"Ash Barty the person has so many dreams she wants to chase after that don't necessarily involve travelling the world, being away from my family, being away from my home, which is where I've always wanted to be," she said in the video, interviewed by her close friend and former doubles partner Casey Dellacqua.

"I'll never, ever stop loving tennis, it's been a massive part of my life, but I think it's important that I get to enjoy the next part of my life as Ash Barty the person, not Ash Barty the athlete."