Horst Skoff defeated Andrei Chesnokov 6-4 1-6 6-4 in the Bastad quarter-final on clay. The upset overturned the form book — Andrei Chesnokov came in leading the head-to-head 1–0, but Horst Skoff had been the form player, winning 2 of their last 4 on clay. Horst Skoff claimed a first win over Andrei Chesnokov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-04-01 | Estoril | QF | clay | Andrei Chesnokov | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.