 World: Billie Jean King Cup - Group I - Doubles - Placement matches |
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| | Nagy A./Stollar F. | Cengiz B./Oz I. | WO. | details | 13.04.2024 |
| World: Billie Jean King Cup - Group I - Doubles - Main |
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| | Ostapenko J./Semenistaja D. | Cengiz B./Oz I. | 2:1 (6:1, 64:7, 10:7) | details | 10.04.2024 |
| | Cengiz B./Oz I. | Jorge F./Jorge M. | CAN. | details | 09.04.2024 |
| | Lamens S./Schuurs D. | Cengiz B./Oz I. | 2:0 (7:65, 6:1) | details | 08.04.2024 |
 Croatia: W75 Split - Doubles - Main |
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| 1/8-finals | Cascino E./Monnet C. | Cengiz B./Oz I. | 2:0 (7:64, 6:1) | details | 03.04.2024 |
 Slovenia: W60 Koper - Doubles - Main |
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| Quarter-finals | Lamens S./McPhee K. | Cengiz B./Oz I. | 2:0 (6:3, 6:4) | details | 20.04.2023 |
| 1/8-finals | Cengiz B./Oz I. | Juric N./Znuderl A. | 2:0 (6:1, 6:3) | details | 18.04.2023 |
| World: Billie Jean King Cup - Group I - Doubles - Main |
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| | Vismane D./Zeltina B. | Cengiz B./Oz I. | CAN. | details | 14.04.2023 |
 South Africa: W60 Pretoria - Doubles - Main |
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| 1/8-finals | Cengiz B./Oz I. | Duerst J./Ostlund F. | CAN. | details | 14.03.2023 |
| South Africa: W25 Pretoria - Doubles - Main |
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| Semi-finals | Babos T./Garcia-Perez G. | Cengiz B./Oz I. | 2:1 (4:6, 6:3, 10:5) | details | 10.03.2023 |
| Quarter-finals | Cengiz B./Oz I. | Easwaramurthi A./Pavlova K. | 2:0 (6:2, 6:1) | details | 09.03.2023 |
| 1/8-finals | Cengiz B./Oz I. | Di Girolami T./Vlasselaer C. | 2:1 (3:6, 7:67, 10:6) | details | 08.03.2023 |
 Turkey: Istanbul - Doubles - Main |
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| Quarter-finals | Cengiz B./Oz I. | Bouzkova M./Sorribes Tormo S. | 0:2 (5:7, 5:7) | details | 21.04.2022 |
| 1/8-finals | Cengiz B./Oz I. | Han X.Y./Sizikova Y. | 2:1 (5:7, 6:3, 10:8) | details | 20.04.2022 |
 Portugal: W25 Lisbon 2 - Doubles - Main |
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| Quarter-finals | Ormaechea P./Stevanovic N. | Cengiz B./Oz I. | 2:0 (6:2, 6:4) | details | 30.09.2021 |
| 1/8-finals | Marcinkevica D./Poznikhirenko G. | Cengiz B./Oz I. | 1:2 (4:6, 6:4, 9:11) | details | 29.09.2021 |
 United Arab Emirates: W25 Dubai - Doubles - Main |
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| Final | Cengiz B./Oz I. | Bektas E./Moore T. | 1:2 (5:7, 6:4, 7:10) | details | 03.04.2021 |
| Semi-finals | Choi J. H./Han N. | Cengiz B./Oz I. | 0:2 (2:6, 2:6) | details | 02.04.2021 |
| Quarter-finals | Ainitdinova G./Hatouka Y. | Cengiz B./Oz I. | 0:2 (4:6, 5:7) | details | 01.04.2021 |
| 1/8-finals | Cengiz B./Oz I. | Bhatia R./Bulgaru M. | 2:0 (6:2, 6:1) | details | 31.03.2021 |
 Russia: W25 Kazan - Doubles - Main |
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| Quarter-finals | Eikeri U./Talbi S. | Cengiz B./Oz I. | 2:0 (7:65, 6:3) | details | 10.03.2021 |
| 1/8-finals | Makarova E./Malygina E. | Cengiz B./Oz I. | 0:2 (4:6, 2:6) | details | 09.03.2021 |
