Gilbert Schaller defeated Horst Skoff 6-3 6-0 in the Hamburg round of 64 on clay. The upset overturned the form book — Horst Skoff came in leading the head-to-head 2–0. Gilbert Schaller claimed a first win over Horst Skoff in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-04-26 | Atlanta | R32 | hard | Horst Skoff | 7-5 6-1 |
| 1993-02-22 | Mexico City | R32 | clay | Horst Skoff | 6-1 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.