David Diaz Ventura defeated Andoni Vivanco Guzman 6-3 7-5 in the Spain F15 round of 32 on clay. The upset overturned the form book — Andoni Vivanco Guzman came in leading the head-to-head 1–0. David Diaz Ventura claimed a first win over Andoni Vivanco Guzman in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-10 | Spain F16 | R32 | clay | Andoni Vivanco Guzman | 6-1 |