Pete Sampras defeated Ramon Delgado 7-6 6-2 in the Scottsdale round of 32 on hard. The upset overturned the form book — Ramon Delgado came in defending last year's round of 32, but Pete Sampras had been the form player, winning 6 of their last 6 on hard. Pete Sampras extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-25 | Roland Garros | R64 | clay | Ramon Delgado | 7-6(6) 6-3 6-4 |
| 1998-04-27 | Atlanta | QF | hard | Pete Sampras | 7-6(6) 7-6(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 (190 vs 112). ATP, WTA & Challenger.