Mark Knowles defeated Laurence Tieleman 7-6 7-6 in the US Open qualifying round of 64 on hard. The upset overturned the form book — Laurence Tieleman came in leading the head-to-head 1–0, defending last year's round of 32, but Mark Knowles had been the form player, winning 2 of their last 7 on hard. Mark Knowles claimed a first win over Laurence Tieleman in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-06 | Newport | QF | grass | Laurence Tieleman | 6-4 7-5 |
Averages over each player's completed matches in the selected window (2 vs 26). 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