Felix Mantilla defeated Thomas Muster 6-3 6-2 in the Estoril round of 32 on clay. The upset overturned the form book — Thomas Muster came in leading the head-to-head 2–1, defending last year's final, but Felix Mantilla had been the form player, winning 3 of their last 7 on clay. Felix Mantilla narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-25 | Roland Garros | QF | clay | Felix Mantilla | 6-4 6-2 4-6 6-3 |
| 1998-05-11 | Rome Masters | R32 | clay | Thomas Muster | 6-4 3-6 6-4 |
| 1995-08-07 | San Marino | R16 | clay | Thomas Muster | 6-3 6-2 |
Averages over each player's completed matches in the selected window (200 vs 17). 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