Stefan Koubek defeated Michael Kohlmann 6-4 6-4 in the Houston qualifying round of 16 on clay.
Koubek S. took it in straight sets.
Stefan Koubek beat Michael Kohlmann 6-4 6-4. Umpiry, "Stefan Koubek vs Michael Kohlmann — Houston Qualifying Round of 16", https://umpiry.com/match/2006-04-09/kohlmann-vs-koubek-houston-q16?utm_source=cite (as of 9 April 2006).