Radka Bobkova defeated Mariana Diaz Oliva 6-3 3-6 6-0 in the Sopot 75K round of 16 on clay. The upset overturned the form book — Mariana Diaz Oliva came in leading the head-to-head 1–0. Radka Bobkova claimed a first win over Mariana Diaz Oliva in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-06-09 | Budapest 50K | R32 | clay | Mariana Diaz Oliva | 6-7 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.