Ivan Bas Mengual defeated David Leon Moros 6-3 6-3 in the M15 Madrid 1 q32 on clay. The upset overturned the form book — David Leon Moros came in leading the head-to-head 1–0. Ivan Bas Mengual claimed a first win over David Leon Moros in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-10 | M15 Platja D'Aro 2 | Q64 | clay | David Leon Moros | 6-4 6-2 |