Former world number one and 2008 French Open champion Ana Ivanovic has announced her retirement from tennis at the age of 29.

Ana Ivanovic
Ana Ivanovic Has Been Former World No. 1 And French Open Winner

The Serb has been out with injury since August and dropped to 63 in the world rankings, having won just 15 matches in 2016 , the most recent in June.

She said that she can only play if it is up to her own high standards. Since she felt she can no longer do that so it was time to move on

Ivanovic spent 12 weeks as world number one in 2008 and won 15 career singles titles.

She reached the French Open semi-final in 2015 and was runner-up at Roland Garros and Wimbledon in 2007 and at the 2008 Australian Open.

Ivanovic, who married Manchester United midfielder Bastian Schweinsteiger earlier this year, said she will explore opportunities in business, beauty and fashion in retirement and said it will allow her more time for her work with UNICEF, with whom she holds the position of National Ambassador for Serbia.