Marc Kevin Goellner defeated Thierry Guardiola 6-4 6-3 in the New Haven round of 64 on hard. The upset overturned the form book — Thierry Guardiola came in leading the head-to-head 1–0, but Marc Kevin Goellner had been the form player, winning 4 of their last 5 on hard. Marc Kevin Goellner claimed a first win over Thierry Guardiola in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-24 | Netherlands Masters 3 | QF | clay | Thierry Guardiola | 6-3 7-6 |
Averages over each player's completed matches in the selected window (123 vs 11). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About