Scott Gessner defeated Lars Koslowski 7-6 6-2 in the Germany 1 Masters 2 round of 16 on clay. The upset overturned the form book — Lars Koslowski came in leading the head-to-head 1–0. Scott Gessner claimed a first win over Lars Koslowski in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-04-14 | Germany 2 Masters 2 | R32 | clay | Lars Koslowski | 6-1 7-5 |