Jan Weinzierl defeated Lars Koslowski 2-6 7-6 6-3 in the Spain 1 Masters 1 round of 32 on clay. The upset overturned the form book — Lars Koslowski came in leading the head-to-head 1–0. Jan Weinzierl claimed a first win over Lars Koslowski in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-01-05 | Spain 1 Masters 4 | R16 | clay | Lars Koslowski | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.