Nikola Gnjatović

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

Gnjatović was born in Vračar, Belgrade and started out at the Košutnjak tennis club. When he was 16 he won Yugoslavia's national under 18s championship in both singles and doubles. Srđan Đoković, father of Novak, once said that he had never seen a more talented player. In 1999, he represented the Yugoslavia Davis Cup team for a tie against Morocco in Casablanca. His career however soon unravelled after he began taking heroin. He became addicted to the drug and over a 17 year period was hospitalised on numerous occasions, but is now clean.