Arne Thoms defeated Jordi Mas 6-3 6-4 in the Spain 4 Masters 2 round of 16 on hard. The upset overturned the form book — Jordi Mas came in leading the head-to-head 1–0. Arne Thoms claimed a first win over Jordi Mas in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-04-22 | Spain 4 Masters 4 | QF | hard | Jordi Mas | 1-6 6-2 6-4 |
Averages over each player's completed matches in the selected window (1 vs 2). 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. Small sample — read as indicative. About