Andrea Glass defeated Conchita Martinez 3-6 6-3 6-2 in the Fed Cup WG1 QF: GER vs ESP round robin on carpet. The upset overturned the form book — Conchita Martinez came in leading the head-to-head 1–0. Andrea Glass claimed a first win over Conchita Martinez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-26 | Hamburg | R16 | clay | Conchita Martinez | 4-6 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.