Conchita Martinez defeated Andrea Glass 4-6 7-5 6-1 in the Hamburg round of 16 on clay. The upset overturned the form book — Andrea Glass came in leading the head-to-head 1–0. Conchita Martinez claimed a first win over Andrea Glass in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-18 | Fed Cup WG1 QF: GER vs ESP | RR | carpet | Andrea Glass | 3-6 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.