Nikola Gnjatović (born 15 September 1979) is a Serbian former professional tennis player.

[1] Gnjatović was born in Vračar, Belgrade and started out at the Košutnjak tennis club.

[2] Srđan Đoković, father of Novak, once said that he had never seen a more talented player.

[3] In 1999, he represented the Yugoslavia Davis Cup team for a tie against Morocco in Casablanca.

He became addicted to the drug and over a 17 year period was hospitalised on numerous occasions, but is now clean.