Former French Open champion Ana Ivanovic announced her retirement from tennis at the age of 29 on 28 December 2016 because she no longer feels fit enough to compete at the highest level. Ivanovic became the first Serbian woman to win a grand slam tournament when she beat Russian Dinara Safina in the 2008 French Open final, following in the footsteps of compatriot Novak Djokovic who clinched the Australian Open title the same year. “There is no other way to say it. I have decided to retire from professional tennis. It has been a difficult decision but there is so much to celebrate,” Belgrade-born she said on Facebook. The 29-year-old was out of action since August following injury and dropped to 63 in world rankings. Ivanovic was world number one for 12 weeks in 2008 and won 15 singles titles in her 13-year-long career. Her French Open victory catapulted Ivanovic to the summit of the WTA tour rankings but she only occupied top spot for a few weeks and dropped to 22nd at the end of 2009 after a dramatic loss of form. She returned to the top five in 2014 and reached the French Open semi-finals in 2015, but slipped out of the leading 60 this year after losing to little-known Czech Denisa Allertova in the US Open first round, her final match on the WTA tour. Ivanovic, the world number 63, married former Germany soccer international Bastian Schweinsteiger this year.