 Turkey: Istanbul - Doubles - Main |
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| 1/8-finals | Gengel M./Poljak D. | De Jong J./Hermans M. | 1:2 (6:3, 5:7, 7:10) | details | 05.09.2023 |
 Czech Republic: M25 Most - Doubles - Main |
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| Final | Gengel M./Poljak D. | Frantzen C./Sandkaulen T. | 1:2 (3:6, 6:4, 7:10) | details | 21.05.2022 |
| Semi-finals | Gengel M./Poljak D. | Barnat J./Satral J. | 2:1 (6:4, 4:6, 10:8) | details | 20.05.2022 |
| Quarter-finals | Gengel M./Poljak D. | Schlagenhauf N./Wunderlich Y. | 2:0 (7:5, 6:3) | details | 19.05.2022 |
| 1/8-finals | Gengel M./Poljak D. | Markiewicz J./Opitz J. | 2:0 (7:60, 6:4) | details | 17.05.2022 |
| Czech Republic: M25 Prague - Doubles - Main |
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| Semi-finals | Gengel M./Poljak D. | Cukierman D./Harris A. | 0:2 (3:6, 3:6) | details | 13.05.2022 |
| Quarter-finals | Gengel M./Poljak D. | Barton H./Brunclik P. | 2:0 (6:3, 6:2) | details | 12.05.2022 |
| 1/8-finals | Gengel M./Poljak D. | Galik M./Havlicek M. | 2:0 (6:3, 6:2) | details | 10.05.2022 |
 Switzerland: M25 Trimbach - Doubles - Main |
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| Semi-finals | Gengel M./Poljak D. | Masur D./Steinegger Y. | 0:2 (4:6, 3:6) | details | 18.03.2022 |
| Quarter-finals | Frantzen C./Jebens H. | Gengel M./Poljak D. | 1:2 (6:4, 2:6, 11:13) | details | 17.03.2022 |
| 1/8-finals | Moghini G./Taddia L. | Gengel M./Poljak D. | 1:2 (3:6, 6:3, 6:10) | details | 15.03.2022 |
 Lithuania: M25 Vilnius - Doubles - Main |
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| Quarter-finals | Gengel M./Poljak D. | Fajta P./Marozsan F. | 1:2 (6:3, 4:6, 7:10) | details | 19.01.2022 |
 Italy: Forli 3 - Doubles - Main |
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| Semi-finals | Gengel M./Poljak D. | Bortolotti M./Martos Gornes S. | 1:2 (4:6, 7:65, 8:10) | details | 10.12.2021 |
| Quarter-finals | Capecchi D./Vilardo F. | Gengel M./Poljak D. | 0:2 (2:6, 3:6) | details | 09.12.2021 |
| 1/8-finals | Gengel M./Poljak D. | Marfia M./Virgili A. | 2:0 (6:2, 6:3) | details | 08.12.2021 |
| 1/8-finals | Gengel M./Poljak D. | Brancaccio R./Vega Hernandez D. | CAN. | details | 08.12.2021 |
 Ecuador: Salinas - Doubles - Main |
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| 1/8-finals | Gengel M./Poljak D. | Hidalgo D./Mansouri S. | 1:2 (7:611, 3:6, 7:10) | details | 21.04.2021 |
 Egypt: M15 Sharm El Sheikh 5 - Doubles - Main |
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| Quarter-finals | Khotkov O./Uzhylovskyi V. | Gengel M./Poljak D. | WO. | details | 05.03.2020 |
| 1/8-finals | Crepaldi E./Ricca G. | Gengel M./Poljak D. | 0:2 (3:6, 65:7) | details | 03.03.2020 |
| Egypt: M15 Sharm El Sheikh 4 - Doubles - Main |
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| 1/8-finals | Gengel M./Poljak D. | Capecchi D./Maestrelli F. | 1:2 (64:7, 6:4, 8:10) | details | 25.02.2020 |
 France: M15 Bressuire - Doubles - Main |
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| 1/8-finals | Gengel M./Poljak D. | Marek W./Samuelsson C. | 0:2 (3:6, 4:6) | details | 21.01.2020 |
