Between Andrei Olhovskiy and Jelena Janković, who became a pro earlier?
Andrei Olhovskiy Andrei Stanislavovich Olhovskiy (Russian: Андрей Станиславович Ольховский ) (born 15 April 1966) is a former tennis player from Russia, who turned professional in 1989.
Novak Djokovic Novak Djokovic (Serbian: Новак Ђоковић , "Novak Đoković", ] ; born 22 May 1987) is a Serbian professional tennis player widely regarded as one of the greatest tennis players of all time.