Meghann Shaughnessy defeated Marissa Irvin 6-4 1-6 7-5 in the Shanghai round of 16 on hard. The upset overturned the form book — Marissa Irvin came in leading the head-to-head 2–1, but Meghann Shaughnessy had been the form player, winning 1 of their last 4 on hard. Meghann Shaughnessy 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) |
| 2002-03-18 | Miami | R32 | hard | Marissa Irvin | 4-6 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.