Boris Becker defeated Felix Mantilla 6-4 6-4 in the Gstaad quarter-final on clay. The upset overturned the form book — Felix Mantilla came in defending the title. Boris Becker extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-20 | Stuttgart Outdoor | R16 | clay | Boris Becker | 7-6(2) 7-5 |
| 1997-05-05 | Hamburg Masters | R16 | clay | Felix Mantilla | 7-6(6) 6-2 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (40 vs 200). ATP, WTA & Challenger.