Although Matkovich missed national selection in 2002, he was again a member of the 4×200-metre freestyle relay in 2003, swimming in the heats at the 2003 World Championships in Barcelona, Spain, where Australia won gold again. In Athens, Matkovich swum in the heats, before the team of Ian Thorpe, Nicholas Sprenger, Grant Hackett and Michael Klim were beaten by the United States team in the final by just 0.13 of a second. He currently coaches water polo and swimming at Aquinas College in Perth.