Thiago Moura Monteiro leads 2 to 1 over 3 singles meetings since 2023. Last meeting on 08/02/2026 at Argentina Open - Buenos Aires.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 08/02/2026 | Argentina Open - Buenos Aires | Qualifiers | clay | Dellien | 6-1 3-1 |
| 19/11/2023 | Montevideo Challenger | Semi-final | clay | Monteiro | 6-7(1) 6-1 3-5 |
| 06/10/2023 | Campinas Challenger | Quarter-final | clay | Monteiro | 7-6(5) 4-6 3-6 |
| clay | Monteiro 2 - 1 Dellien |
| 2026 | Monteiro 0 - 1 Dellien |
| 2023 | Monteiro 2 - 0 Dellien |
190 wins, 157 losses since 2021 (54.8%).
Last matches: D V V D V
219 wins, 135 losses since 2021 (61.9%).
Last matches: V V V V D
Thiago Moura Monteiro leads 2 to 1 over 3 singles meetings since 2023.
On 08/02/2026, at Argentina Open - Buenos Aires (Qualifiers): Hugo Dellien won 6-1 3-1.