Dmitry Vlasov defeated Daniel Casquero 6-7 6-1 7-5 in the Spain 4 4 qualifying round on clay. The upset overturned the form book — Daniel Casquero came in leading the head-to-head 1–0, but Dmitry Vlasov had been the form player, winning 3 of their last 7 on clay. Dmitry Vlasov claimed a first win over Daniel Casquero in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-04-07 | Spain 4 1 | R16 | clay | Daniel Casquero | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.