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.
Ksenia Pervak Ksenia Yuryevna Pervak (Russian: Ксения Юрьевна Первак ; born 27 May 1991 in Chelyabinsk, Soviet Union) is a Russian professional tennis player.