Former world number one and 2008 French Open champion Ana Ivanovic has retired from tennis at the age of 29.
The 2008 French Open champion made the announcement via her Facebook page, saying that due to injuries she feels she can no longer play at the elite level she demands from herself.
"I've decided to retire from professional tennis," the 29-year-old Serb said via Facebook Live.
"This has been a difficult decision but there has been so much to celebrate.
"By the time I was ranked number one in the world in 2008 I had seen highs I'd never dreamed of. I won 15 WTA titles and played three grand slam finals.
"But seeing those highs demands top physical form and it's well-known that I have been hampered by injuries.
"I can only play on if I can perform to my own high standards, and I can no longer do that, so it is time to move on."
Ivanovic endured a tough year in 2016 as she battled injuries and some indifferent form that saw her finish her year after a first round exit at September's US Open.
That US Open defeat followed a first round loss at Wimbledon and third round exits at her two favoured grand slams, the Australian and French Opens, she finished the year with a world ranking of 63.
Many big moments for Ivanovic at Melbourne Park
A long-time favourite of Australian fans, Ivanovic made the Australian Open final in 2008 before going on to win her only grand slam title at the 2008 French Open and becoming the first Serbian world number one tennis player.
Her Roland Garros success came when she beat Russian Dinara Safina 6-4, 6-3, one year after being humbled by Belgian Justine Henin 6-1, 6-2 in the final.
Her 2008 Australian Open run saw plenty of Australian fans adopt her as their own but ultimately she fell short, losing the final in straight sets 7-5, 6-3 to Russia's Maria Sharapova.
And while Ivanovic never quite reached the same heights at Melbourne Park, she did famously claim her only victory over Serena Williams at the venue.
In the 2014 tournament Ivanovic embarked on a breathtaking run that saw her come from a set down to beat Australia's Sam Stosur 6-7 (10-8), 6-4, 6-2 in the third round before doing the same to Williams.
Ivanovic roared back from a set down to shock the American 4-6, 6-3, 6-3 with a superb display of power-hitting.
She eventually fell to Canadian Eugenie Bouchard in another three-setter in the quarters, although this time it was Bouchard who won after dropping the opening set, with a 5-7, 7-5, 6-2 win.
Last year's tournament ended in drama for Ivanovic, after her coach Nigel Sears collapsed in the stands at Rod Laver Arena during her third-round loss to Madison Keys.
Ivanovic also claimed the first of her 15 career titles in Australia when at 17 she won the now defunct Canberra International with a 7-5, 6-1 victory over Austria's Melinda Czink.
The decision to retire comes as a surprise as she was expected to play in the Auckland Classic, which she won in 2014.