Vaclav Roubicek defeated Sebastian Weisz 6-3 6-1 in the Argentina 3 Masters 4 round of 16 on clay. The upset overturned the form book — Sebastian Weisz came in leading the head-to-head 2–0, but Vaclav Roubicek had been the form player, winning 4 of their last 8 on clay. Vaclav Roubicek claimed a first win over Sebastian Weisz in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-07-12 | Hungary Masters 4 | R16 | clay | Sebastian Weisz | 6-0 6-2 |
| 1996-11-02 | Uruguay Paraguay Masters 1 | R16 | clay | Sebastian Weisz | 6-4 6-3 |