Jacco Van Duyn defeated Douglas Geiwald 6-4 6-4 in the USA 1 Masters 4 round of 32 on clay. The upset overturned the form book — Douglas Geiwald came in leading the head-to-head 1–0. Jacco Van Duyn claimed a first win over Douglas Geiwald in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-02-10 | Great Britain 1 Masters 1 | R32 | carpet | Douglas Geiwald | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.