Radim Zitko defeated Christian Grunes 6-3 6-3 in the Czech Rep F3 qualifying round on clay. Radim Zitko extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-01-24 | Austria F1 | R32 | carpet | Radim Zitko | 6-2 3-6 6-0 |
| 1998-07-13 | Denmark F3 | QF | clay | Christian Grunes | 2-6 6-2 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.