Adolfo Daniel Vallejo leads 3 to 1 over 4 singles meetings since 2025. Last meeting on 29/01/2026 at Concepcion Challenger.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 29/01/2026 | Concepcion Challenger | Round 2 | clay | Vallejo | 6-4 5-2 |
| 23/11/2025 | Guayaquil Challenger | Final | clay | Vallejo | 5-7 7-6(7) 3-6 |
| 05/09/2025 | M25 Mar Del Plata | Semi-final | clay | Vallejo | 6-1 6-6 |
| 19/01/2025 | Buenos Aires Challenger | Final | clay | Varillas | 4-6 4-6 |
| clay | Varillas 1 - 3 Vallejo |
| 2026 | Varillas 0 - 1 Vallejo |
| 2025 | Varillas 1 - 2 Vallejo |
219 wins, 145 losses since 2021 (60.2%).
Last matches: D D V D D
188 wins, 124 losses since 2021 (60.3%).
Last matches: D V D D V
Adolfo Daniel Vallejo leads 3 to 1 over 4 singles meetings since 2025.
On 29/01/2026, at Concepcion Challenger (Round 2): Adolfo Daniel Vallejo won 6-4 5-2.