Adolfo Daniel Vallejo defeated Lautaro Midon 7-6 6-3 in the M25 Mar Del Plata 1 final on clay. The upset overturned the form book — Lautaro Midon came in leading the head-to-head 1–0, but Adolfo Daniel Vallejo had been the form player, winning 9 of their last 9 on clay. Adolfo Daniel Vallejo claimed a first win over Lautaro Midon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-09-01 | M15 Buenos Aires 1 | QF | clay | Lautaro Midon | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.