Djokovic - Jelena
Novak Djokovic with his girlfriend for more than eight years Jelena Ristic.

World No. 2 Novak Djokovic announced that he and longtime girlfriend Jelena Ristic are expecting their first child. 

The six-time Grand Slam champ, broke the news on Twitter and Facebook on Thursday.

in September 2013, Djokovic had posted: "Getting used to introducing Jelena as my fiancé and future wife. So happy!"

On Thursday, on his official Facebook page he wrote:

My dear friends,

You've been with me through many tough and good times in my career. I've been blessed to travel the world, play the most beautiful sport that brings me a lot of excitement and joy; I am happy, loved and healthy. Jelena and I are truly blessed to soon become parents! My love is pregnant!

Djokovic poses with his girlfriend. Reuters

The couple have been dating since 2005 and got engaged in September 2013. In February this year, 26-year-old Djokovic had said that the two would be married soon, but there were no developments seen after.

Djokovic and Jelena in Greece
Holidaying in Greece.

Jelena runs his humanitarian aid organization and is right now touring Greece with her celeb fiancé, who is currently on short break between tournaments. Djokovic is also nursing the right wrist injury he suffered during the Monte Carlo Masters he last played.

"Greetings from Greece! I'm resting my hand, as doctor suggested, and enjoying beautiful Athens with my love," he posted on his Facebook page on 23 April.

Djokovic had once stated that his girlfriend was his 'Ms.Universe'

The Serb should be ready for the rest of the clay-court season that starts with the Madrid Masters on 4 May. The only Grand Slam missing from his collection is the French Open title, where he has been a finalist in 2012 and semifinalist in 2013 - losing both times to eight-time champ Rafael Nadal.

The French Open starts on 25 May while the ATP 1000 Masters in Rome is scheduled for 11 May. With so little gap between tournaments, Djokovic is hoping for a complete recovery via the two-week break now.