Lautaro Midon defeated Adolfo Daniel Vallejo 6-3 6-4 in the M15 Buenos Aires 1 quarter-final on clay. The upset overturned the form book — Adolfo Daniel Vallejo came in leading the head-to-head 1–0. Lautaro Midon claimed a first win over Adolfo Daniel Vallejo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-09-06 | M25 Mar Del Plata 1 | F | clay | Adolfo Daniel Vallejo | 7-6(4) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.