Thomas Enqvist defeated Pete Sampras 6-3 3-6 6-3 in the Indian Wells Masters quarter-final on hard. The upset overturned the form book — Pete Sampras came in leading the head-to-head 3–0, defending last year's round of 32. Thomas Enqvist claimed a first win over Pete Sampras in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-22 | Wimbledon | R32 | grass | Pete Sampras | 6-3 7-6(4) 7-6(3) |
| 1998-05-11 | Rome Masters | R64 | clay | Pete Sampras | 7-6(3) 6-4 |
| 1998-02-23 | Philadelphia | F | hard | Pete Sampras | 7-5 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 (200 vs 143). ATP, WTA & Challenger.