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.
Jan Hernych Jan Hernych (born 7 July 1979) is a professional male tennis player from Czech Republic. Born in Prague, he turned pro in 1998 and achieved his career-high singles ranking of World No. 59 in April 2009. He won one doubles title and was runner-up in 's-Hertogenbosch in 2006.