Paul Dogger defeated Bernd Karbacher 6-1 1-6 7-6 in the Spain 1 Masters 4 qualifying round on hard. The upset overturned the form book — Bernd Karbacher came in leading the head-to-head 1–0. Paul Dogger claimed a first win over Bernd Karbacher in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-01-05 | Spain 1 Masters 1 | R16 | hard | Bernd Karbacher | 7-5 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.