Tennis Star Novak Djokovic Announces Engagement

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Tennis star Novak Djokovac, 26, is officially off the market.

Djokovic announced his engagement to his longtime girlfriend Jelena Ristic on his WhoSay page, posting a photo of Ristic kissing his cheek with the caption, "Meet my fiancé and future wife :) So happy! Thank you for wonderful wishes #NoleFam and friends!"

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The couple have been together for eight years.

There are rumors that fellow tennis star Andy Murray will serve as the best man at Djokovac's wedding to Ristic -- who serves as the director of the Novak Djokovic foundation, a charity aiming to bring early-childhood education to children in Serbia -- though he has not confirmed it.

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Other good news for Djokovic?

He recently marked his 100th week at No. 1 in the Association of Tennis Professionals rankings. He is only the ninth player ever to reach the milestone, joining tennis legends such as Andre Agassi, Rafael Nadal, John McEnroe, Pete Sampras and Roger Federer.