Adam Kellner defeated Jurgen Zopp 6-2 6-4 in the Czech Rep F3 qualifying round on clay. The upset overturned the form book — Jurgen Zopp came in leading the head-to-head 3–0. Adam Kellner claimed a first win over Jurgen Zopp in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-05 | Davis Cup G2 R1: EST vs HUN | RR | hard | Jurgen Zopp | 6-3 7-6 6-4 |
| 2009-01-26 | Israel F2 | R16 | hard | Jurgen Zopp | 6-3 6-2 |
| 2008-10-06 | Morocco F6 | R16 | clay | Jurgen Zopp | 6-1 2-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.