 Germany: M15 Kamen - Doubles - Main |
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| Quarter-finals | Dedura-Palomero M./Larwig N. | Gavrielides L./Poertner L. | 2:1 (4:6, 6:2, 10:8) | details | 27.06.2024 |
| 1/8-finals | Hartig R./Sobbe L. M. | Gavrielides L./Poertner L. | 0:2 (4:6, 64:7) | details | 25.06.2024 |
 Morocco: M15 Casablanca - Doubles - Main |
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| Final | Matsuoka H./Poertner L. | Benchakroun M./Dlimi Y. | 2:1 (68:7, 6:2, 10:8) | details | 22.06.2024 |
| Semi-finals | Matsuoka H./Poertner L. | Lalami Laaroussi Y./Trochu P. | 2:1 (65:7, 6:4, 12:10) | details | 21.06.2024 |
| Quarter-finals | Matsuoka H./Poertner L. | Gonzalez Fernandez M./Syromolotov Netrebin S. | 2:0 (6:2, 7:63) | details | 20.06.2024 |
| 1/8-finals | Hamza Reguig S./Reitano S. | Matsuoka H./Poertner L. | 0:2 (1:6, 4:6) | details | 18.06.2024 |
 Serbia: M15 Kursumlijska Banja 6 - Doubles - Main |
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| 1/8-finals | Radjenovic V./Skobelev S. | Poertner L./Woerner P. | 2:0 (6:4, 7:62) | details | 29.05.2024 |
 Turkey: M15 Antalya 9 - Doubles - Main |
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| 1/8-finals | Lavizzari M./Pecak S. | Fix D./Poertner L. | 2:1 (3:6, 6:2, 10:8) | details | 02.04.2024 |
 Egypt: M15 Sharm ElSheikh 7 - Doubles - Main |
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| 1/8-finals | Grzegorzewski O./Poertner L. | Elsayed A./van Wyk K. | 0:2 (2:6, 67:7) | details | 12.03.2024 |
| Germany: M15 Oberhaching - Doubles - Main |
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| 1/8-finals | Lane L./Lemstra K. | Majdandzic M./Poertner L. | 2:0 (7:61, 6:3) | details | 13.02.2024 |
 Qatar: M15 Doha 3 - Doubles - Main |
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| Semi-finals | Negritu Ch./Poertner L. | Agafonov E./Sharipov M. | 0:2 (3:6, 4:6) | details | 12.10.2023 |
| Quarter-finals | Negritu Ch./Poertner L. | Thurner D./Thurner N. | 2:0 (6:2, 7:61) | details | 11.10.2023 |
| 1/8-finals | Negritu Ch./Poertner L. | Alkotop Moh./Alkotop M. | WO. | details | 10.10.2023 |
| Qatar: M15 Doha 2 - Doubles - Main |
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| Semi-finals | Negritu Ch./Poertner L. | Deschamps T./Folliot Q. | 1:2 (6:3, 3:6, 2:10) | details | 06.10.2023 |
| Quarter-finals | Negritu Ch./Poertner L. | Habib A./Vujic S. | 2:0 (6:3, 6:3) | details | 05.10.2023 |
| 1/8-finals | Negritu Ch./Poertner L. | Al-Sulaiti G./Shanan Al Harrasi I. | 2:0 (6:1, 6:0) | details | 03.10.2023 |
 USA: US Open - Doubles - Main |
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| 1/16-finals | Budkov Kjaer N./Poertner L. | Bondioli F./Schwaerzler J. J. | 1:2 (4:6, 7:65, 3:10) | details | 04.09.2023 |
| Germany: M15 Frankfurt am Main - Doubles - Main |
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| Quarter-finals | Haerteis J./Schell N. | Kelm Y./Poertner L. | WO. | details | 11.08.2023 |
| 1/8-finals | Alabdullah B./Mubarak A. | Kelm Y./Poertner L. | 0:2 (2:6, 0:6) | details | 08.08.2023 |
Netherlands: M15 Eindhoven - Singles - Main
United Kingdom: Wimbledon - Singles - Qualification