Vladyslav Vasylovych Tretiak (born 21 February 1980) is a Ukrainian sabre fencer. Tretiak competed in men's sabre at the 2004 Summer Olympics. He reached the semifinals after defeating teammate Volodymyr Lukashenko, but lost to Hungary's Zsolt Nemcsik. He prevailed over Dmitry Lapkes of Belarus to take the bronze medal. He finished 3rd in Team Sabre at the 2003 World Championships. At the 2006 World Fencing Championships he won a silver medal in the sabre team event together with Dmytro Boiko, Volodymyr Lukashenko and Oleh Shturbabin.