Jan Hernych defeated Andreas Tattermusch 6-4 6-0 in the Czech Republic Masters 3 qualifying round on carpet. The upset overturned the form book — Andreas Tattermusch came in leading the head-to-head 1–0, but Jan Hernych had been the form player, winning 3 of their last 5 on carpet. Jan Hernych claimed a first win over Andreas Tattermusch in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-10-26 | Czech Republic Masters 4 | QF | hard | Andreas Tattermusch | 6-2 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.