Tennis World No. 1 Novak Djokovic is the proud father of a baby boy.

Djokovic tweeted that the child's name is Stefan.

"Stefan, our baby angel was born!" Djokovic posted on Twitter early Wednesday. "I'm so proud of my beautiful wife Jelena! Thank you so much for your love and support. We love you all!!!"

RTS, Serbia's state TV, reported that Djokovic's wife gave birth to their first child on Tuesday in Nice, France, close to Monaco where they reside.

The new parents first met in high school, and they have been together for more than eight years.

The couple married on July 10, four days after Djokovic won Wimbledon.