Former women's tennis world number one Ana Ivanovic admitted Saturday she retired this week because she felt both physically and mentally unfit to carry on after years of battling injuries.

What happened to tennis player Ivanovic?

In 2015, Ivanovic made it to the semifinals of a major for the first time in seven years at the French Open. In late December 2016, she announced her retirement, citing being no longer able to perform to a high standard as a major factor.

What happened Jelena Jankovic?

Former Serbian world No. 1 Jelena Jankovic hasn't played tennis since the 2017 US Open and has kept her life private, aside from occasionally sharing travel photos on Instagram. ... The doctor works at the Institute of Rheumatology in Belgrade and at one private clinic (you can see his photo at the clinic's website).