Christoph was born and raised in St. Georgen, Austria. After high school and his compulsory military service in Austria, he moved to Seattle to attend the University of Washington and play for the Huskies' tennis team. During his senior year, in which he mainly played #2 singles, he helped lead UW to its first and only Pac-10 Championship, was named to the All Pac-10 Second Team, and reached his highest ITA ranking of #37.
Christoph competed in professional tournaments between 1999 - 2009. He had a career high ATP singles ranking of 665 and doubles ranking of 467. During his professional career, Christoph won 6 doubles titles.
Prior to coaching at Northwest High Performance Tennis, Cristoph was the head coach at AV Performance Tennis.