Kuwait: M15 Zahra 3 - Doubles - Main |
| 1/8-finals | Fellin P. O./Oetzbach A. | Bakshi A./Tkemaladze Z. | 0:2 (2:6, 0:6) | details | 12.12.2023 |
Kuwait: M15 Zahra 2 - Doubles - Main |
| 1/8-finals | Fellin P. O./Stephens Z. | Oetzbach A./Steiner M. | CAN. | details | 05.12.2023 |
Dominican Republic: M15 Santo Domingo 2 - Doubles - Main |
| 1/8-finals | Chepik A./Fellin P. O. | Asaba A./Ogura K. | 1:2 (1:6, 7:5, 3:10) | details | 12.11.2023 |
Belgium: M15 Huy - Doubles - Main |
| Quarter-finals | De Jonge D./Fellin P. O. | Pontjodikromo S./Verbeek D. | 1:2 (7:66, 63:7, 8:10) | details | 24.08.2023 |
| 1/8-finals | Sannen T./Stanke C. | De Jonge D./Fellin P. O. | 0:2 (5:7, 2:6) | details | 22.08.2023 |
Germany: M15 Ueberlingen - Doubles - Main |
| 1/8-finals | Fellin P. O./Iamachkine P. | Schnaitter J./Wallner M. | 0:2 (1:6, 3:6) | details | 15.08.2023 |
USA: M25 Calabasas, CA - Doubles - Main |
| 1/8-finals | De Jonge D./Fellin P. O. | Cozbinov A./Shimabukuro S. | 0:2 (4:6, 2:6) | details | 23.03.2022 |
USA: M25 Austin, TX - Doubles - Main |
| 1/8-finals | Claverie L./Fellin P. O. | Frantzen C./Lah S. | 0:2 (5:7, 65:7) | details | 17.11.2021 |
USA: M25 Calabasas, CA - Doubles - Main |
| Quarter-finals | Fellin P. O./Hadigian E. | Fery A./Whitehouse M. | 0:2 (3:6, 2:6) | details | 29.10.2021 |
| 1/8-finals | Fellin P. O./Hadigian E. | Brady K./Brunkow G. | 2:1 (3:6, 6:3, 10:8) | details | 28.10.2021 |
USA: M15 Ithaca, NY - Doubles - Main |
| 1/8-finals | Claverie L./Fellin P. O. | Nava E./Ponwith N. | 0:2 (63:7, 4:6) | details | 06.10.2021 |
Germany: M25 Ueberlingen - Doubles - Main |
| 1/8-finals | Fellin M./Fellin P. O. | Fallert F./Handel T. | 1:2 (6:4, 5:7, 7:10) | details | 18.08.2021 |
Estonia: M15 Parnu - Doubles - Main |
| Quarter-finals | Fellin M./Fellin P. O. | Johnson L./Woerner P. | 0:2 (2:6, 4:6) | details | 05.08.2021 |
| 1/8-finals | Fellin M./Fellin P. O. | Antinheimo O./Ehrnrooth A. | 2:0 (6:3, 7:5) | details | 03.08.2021 |
Tunisia: M15 Monastir 12 - Doubles - Main |
| Quarter-finals | Fellin P. O./Oetzbach A. | Monzon I./Tenti F. | 1:2 (6:2, 4:6, 9:11) | details | 17.09.2020 |
Tunisia: M15 Monastir - Doubles - Main |
| 1/8-finals | Thanos A./Tsitsipas Pe. | Fellin P. O./Oetzbach A. | 0:2 (4:6, 2:6) | details | 15.09.2020 |
Tunisia: M15 Monastir 12 - Doubles - Main |
| 1/8-finals | Thanos A./Tsitsipas Pe. | Fellin P. O./Oetzbach A. | 0:2 (4:6, 2:6) | details | 15.09.2020 |