Dorsch was at Baylor University from 2002 to 2005 and was a member of the Baylor team that claimed the national championship in 2004. A three-time singles and doubles All-American, Dorsch won the Intercollegiate Tennis Association Player of the Year award in 2004 and 2005. He was the NCAA Division 1 singles champion in his final year.[2] The German then committed himself to the international tennis circuit.[3]
He has only been able to qualify once for the main draw of a Grand Slam tournament once, which was at the 2006 Wimbledon Championships.[4] In the opening round he faced former Wimbledon semi-finalist Xavier Malisse, who won in straight sets.[4]
He has won four Challenger titles during his career, two each in singles and doubles, as well as finishing runner-up a further 10 times, again split evenly between singles and doubles.[4]
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.