Sergi Bruguera defeated Julian Alonso 6-2 6-4 in the San Marino quarter-final on clay. The upset overturned the form book — Julian Alonso came in defending last year's quarter-final. Sergi Bruguera extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-20 | Stuttgart Outdoor | R64 | clay | Julian Alonso | 6-4 6-2 |
| 1998-03-09 | Indian Wells Masters | R64 | hard | Sergi Bruguera | 7-6(0) 6-3 |
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 (71 vs 12). ATP, WTA & Challenger.