Tibor Toth defeated Andrei Rybalko 6-4 6-3 in the Hungary Masters 1 round of 32 on clay. The upset overturned the form book — Andrei Rybalko came in leading the head-to-head 1–0. Tibor Toth claimed a first win over Andrei Rybalko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-09-16 | Romania Masters 3 | R16 | clay | Andrei Rybalko | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.