Marissa Irvin defeated Meghann Shaughnessy 4-6 6-3 6-4 in the Miami round of 32 on hard. The upset overturned the form book — Meghann Shaughnessy came in leading the head-to-head 2–1, defending last year's round of 64. Marissa Irvin narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-12 | Stanford | R32 | hard | Marissa Irvin | 6-3 6-1 |
| 2004-06-21 | Wimbledon | R128 | grass | Meghann Shaughnessy | 7-6(3) 7-6(0) |
| 2000-10-14 | Shanghai | R16 | hard | Meghann Shaughnessy | 6-4 1-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.