Career
Hiršzon started to playe tennis at the Varaždin local tennis club Hiršzon stated that under-12 match against Michael Chang stayed etched in his memory the most. As he did not have too much money, Hiršzon came into the field with different rackets while Chang had a whole team behind him.
Best known as a doubles player, Hiršzon had most of his success when partnering countryman Goran Ivanišević.
lieutenant would be the only two finals that the pairing reached during their careers although they did make the semi-finals of the 1993 Austrian Open, the 1996 Eurocard Open in Stuttgart and Munich"s 1998 Bayerische Motoren Werke Open. The Eurocard Open was one of the tour"s Mercedes Super 9 (now Masters) events and the semi-final came down to a third set tiebreak, but the Croatians were unable to defeat Jacco Eltingh and Paul Haarhuis.
Hiršzon and Ivanišević also played together at the 1996 Atlanta Olympics, reaching the quarter-finals, where they were eliminated by eventual bronze medalists, David Prinosil and Marc-Kevin Goellner, from Germany. The Croatians had made it into the quarter-finals with wins over Jonas Björkman/Nicklas Kulti, the fourth seeds, followed by a victory over the Bahamian pairing of Mark Knowles and Roger Smith.
They made it into the round of 16.
On his debut in 1994, he helped Croatia gain promotion to the World Group, with a good performance in their Euro/African semi-final against Norway. Doubles: (2).