The Serbian tennis player was injured since August and dropped to ' 63 in WTA singles rankings. She won a total of 15 matchs in 2016 and the last was won in the month of June .
Ana Ivanovic said,"I can only play it is up to my own standards . I can no longer do that so it is time to move on ."
In 2008 - Serb became the world's no. 1 and spent total 12 weeks on the top.
She won French open in 2008 and became the first Serbian female tennis player to win major title in Tennis circuit. She also reached the French open semi - final in ' 2015 and runner-up at Roland Garros and Australian open in ' 2008 and semi - finals in 2007 Wimbledon Championship.
"It has been very difficult decision for me. " Ivanovic said.
" I began dreaming about tennis .When I was five years old and see Monica Seles on TV ."
Ana Ivanovic married Manchester united footballer Bastian Schweinsteiger this year. She is also the National ambassador for UNICEF in Seriba.