Steffi Graf defeated Amy Frazier 6-2 6-3 in the US Open quarter-final on hard. The upset overturned the form book — Amy Frazier came in leading the head-to-head 1–0, defending last year's round of 64. Steffi Graf claimed a first win over Amy Frazier in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-02 | San Diego | R16 | hard | Amy Frazier | 4-6 7-5 2-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.