Cecil Mamiit defeated Justin Gimelstob 6-3 6-2 in the Washington round of 64 on hard. The upset overturned the form book — Justin Gimelstob came in leading the head-to-head 2–0. Cecil Mamiit claimed a first win over Justin Gimelstob in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-06-11 | Queen's Club | R64 | grass | Justin Gimelstob | 6-1 7-6(5) |
| 2000-02-28 | Delray Beach | R16 | hard | Justin Gimelstob | 1-6 7-6(3) 6-4 |
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 (76 vs 121). ATP, WTA & Challenger.