Career
Marx competes on the Association of Tennis Professionals Challenger Tour and the Association of Tennis Professionals World Tour, both in singles and doubles. He reached his highest Association of Tennis Professionals singles ranking, Number. 300, on April 3, 2006, and his highest Association of Tennis Professionals doubles ranking, Number.
53, on 27 September 2010.
Singles: 6 (2–4)
Doubles: 55 (24–30).