Career
Rehmann was a successful junior player, winning the Boy"s Doubles at the 1993 Australian Open, with countryman Christian Tambue. They defeated the American pairing of Scott Humphries and Jimmy Jackson 6–7, 7–5, 6–2. In 1994 he partnered Australian Joshua Eagle at the Wimbledon Championships but they lost in the opening round to number six seeds Tom Nijssen and Cyril Suk.
He also reached his first Association of Tennis Professionals final that year, at Zaragoza where he lost to Magnus Larsson.
The following year he competed in the singles of the 1995 Australian Open, the only other Grand Slam that he got to compete in. He defeated Luiz Mattar of Brazil 6-3, 6-4, 6-1 and make it into the second round, but then lost to eventual quarter finalist Andriy Medvedev 5-7, 4-6, 1-6.
In Seoul he reached another Association of Tennis Professionals final but was defeated again, this time to Greg Rusedski. Singles: (1)
Doubles: (1).
