Raul Antonio Viver defeated Florian Krumrey 6-1 6-4 in the USA 1 Masters 4 qualifying round on clay. The upset overturned the form book — Florian Krumrey came in leading the head-to-head 1–0, but Raul Antonio Viver had been the form player, winning 7 of their last 10 on clay. Raul Antonio Viver claimed a first win over Florian Krumrey in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-08-10 | Prague | R32 | clay | Florian Krumrey | 6-4 2-6 7-6(2) |