Happy Birthday to Novak Djokovic

Dominique Faget/AFP/Getty Images

Two of Novak Djokovic's big weapons are flexibility and fitness.

Happy 26th birthday, Novak Djokovic! The Serbian tennis star, who made his pro debut 10 years ago when he was 16, has held the No. 1 ranking on the ATP Tour for just over a year. Djokovic, who has won six major titles, will be trying to win a career Grand Slam when the French Open begins next week in Paris. He made it to the final a year ago before losing to Rafael Nadal.

Read more WFYIs.