Career
Despite winning two Grand Prix doubles titles, Haas never competed in the main draw of a Grand Slam event. He did however make some Grand Slam appearances in the juniors. The biggest tournament he participated in as a singles player was the 1991 German Open, part of the Association of Tennis Professionals Super 9 series.
He lost in the first round to Omar Camporese from Italy.
The only occasion that he made it past the opening round of a Grand Prix or Association of Tennis Professionals Tour tournament was in the 1991 Kremlin Cup, where he defeated Soviet Sergej Skakun, before being eliminated in the second round by Jakob Hlasek. They upset the reigning Australian Open champions Rick Leach and Jim Pugh in the semi-finals, then defeated Jeremy Bates and Tom Nijssen in the final.
Doubles: (1).
