09/25/2013 06:43 pm ET Updated Sep 26, 2013

Novak Djokovic Engaged To Girlfriend Jelena Ristic: Tennis Star Shares News On Twitter (PHOTO)

Novak Djokovic has gotten engaged to longtime girlfriend Jelena Ristic. The world's No. 1 tennis player announced the happy news via his Twitter account on Wednesday.

Not long after Djokovic shared a picture of the couple kissing, Ristic, the CEO of Novak Djokovic Foundation, thanked those who have been wishing them well.

The 26-year-old Serbian star won the Australian Open and reached the final at Wimbledon and the U.S. Open in 2013.

PHOTOS: Novak and Jelena