Pedro Martinez Portero leads 2 to 1 over 3 singles meetings since 2021. Last meeting on 31/03/2026 at Tiriac Open - Bucharest.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 31/03/2026 | Tiriac Open - Bucharest | Round 1 | clay | Altmaier | 6-1 5-4 |
| 03/04/2024 | Millennium Estoril Open - Estoril | Round 1 | clay | Portero | |
| 30/07/2021 | Generali Open - Kitzbuhel | Semi-final | clay | Portero | 6-4 3-6 3-6 |
| clay | Altmaier 1 - 2 Portero |
| 2026 | Altmaier 1 - 0 Portero |
| 2024 | Altmaier 0 - 1 Portero |
| 2021 | Altmaier 0 - 1 Portero |
193 wins, 173 losses since 2021 (52.7%).
Last matches: D D V D V
167 wins, 176 losses since 2021 (48.7%).
Last matches: D V D D V
Pedro Martinez Portero leads 2 to 1 over 3 singles meetings since 2021.
On 31/03/2026, at Tiriac Open - Bucharest (Round 1): Daniel Altmaier won 6-1 5-4.