 Indonesia: M15 Jakarta - Doubles - Main |
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| 1/8-finals | Park U./Son J. H. | Kotzen A./Rai A. | 2:0 (6:4, 6:4) | details | 10.08.2022 |
 Malaysia: M15 Kuching - Doubles - Main |
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| 1/8-finals | Lee D. H./Son J. H. | Aggarwal P./Kotzen A. | 2:0 (7:65, 6:2) | details | 02.08.2022 |
| Malaysia: M15 Kuala Lumpur - Doubles - Main |
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| 1/8-finals | Kotzen A./Tepmahc N. | Hazawa S./Takeuchi K. | 0:2 (2:6, 1:6) | details | 26.07.2022 |
 USA: M15 South Bend, IN - Doubles - Main |
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| 1/8-finals | Jachuck R./Kotzen A. | Markes C./Sekiguchi S. | 1:2 (6:4, 3:6, 8:10) | details | 21.06.2022 |
| USA: M15 Ithaca, NY 2 - Doubles - Main |
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| Quarter-finals | Knaff A./Peck J. | Kingsley C./Kotzen A. | WO. | details | 04.11.2021 |
| 1/8-finals | Mao N./Sinha A. | Kingsley C./Kotzen A. | 0:2 (3:6, 3:6) | details | 02.11.2021 |
| USA: M15 Champaign, IL 2 - Doubles - Main |
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| Quarter-finals | Kenyatte K./Ozolins K. | Boitan G. A./Kotzen A. | 2:1 (65:7, 7:64, 10:1) | details | 16.09.2021 |
| 1/8-finals | Blanch D./Cassone M. | Boitan G. A./Kotzen A. | 0:2 (65:7, 2:6) | details | 14.09.2021 |
 Belgium: M25 Koksijde - Doubles - Main |
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| 1/8-finals | Araujo P./Passaro F. | Kotzen A./Vianello M. | WO. | details | 17.08.2021 |
 Poland: M15 Gdynia - Doubles - Main |
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| Semi-finals | Kotzen A./Leite W. | Fery A./Johnson L. | 1:2 (7:5, 5:7, 4:10) | details | 13.08.2021 |
| Quarter-finals | Kotzen A./Leite W. | Marek W./Pawelski M. | 2:1 (7:5, 2:6, 10:7) | details | 12.08.2021 |
| 1/8-finals | Eriksson M./Niklas-Salminen P. | Kotzen A./Leite W. | 0:2 (4:6, 3:6) | details | 11.08.2021 |
 Denmark: M15 Vejle - Doubles - Main |
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| 1/8-finals | Kotzen A./Ricca G. | Korsgaard H. H./Soendergaard S. F. | 1:2 (7:66, 5:7, 6:10) | details | 28.07.2021 |
 Luxembourg: M15 Esch/Alzette - Doubles - Main |
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| Semi-finals | Pozzi D./Weis A. | Kotzen A./Schonenberg T. | 2:0 (7:5, 6:3) | details | 22.07.2021 |
| Quarter-finals | Kotzen A./Schonenberg T. | Kivattsev K./Leite W. | 2:1 (2:6, 6:2, 10:4) | details | 21.07.2021 |
| 1/8-finals | Fenty A./Von der Schulenburg J. | Kotzen A./Schonenberg T. | 0:2 (3:6, 4:6) | details | 19.07.2021 |
 Tunisia: M15 Monastir 24 - Doubles - Main |
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| 1/8-finals | Kotzen A./Rai A. | Descotte M. F./Strombachs R. | 0:2 (65:7, 65:7) | details | 30.06.2021 |
| Tunisia: M15 Monastir 23 - Doubles - Main |
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| 1/8-finals | Kotzen A./Tsitsipas P. | Park U./Tanuma R. | 0:2 (4:6, 2:6) | details | 22.06.2021 |
| Tunisia: M15 Monastir 22 - Doubles - Main |
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| Semi-finals | Banthia S./Kotzen A. | Hong S. C./Nam Ji S. | 0:2 (1:6, 3:6) | details | 18.06.2021 |
| Quarter-finals | Bruna N./Lopez Morillo I. | Banthia S./Kotzen A. | 0:2 (65:7, 4:6) | details | 17.06.2021 |
| 1/8-finals | Banthia S./Kotzen A. | Fancutt T. J./Rai A. | 2:0 (6:3, 6:0) | details | 15.06.2021 |
 India: M15 New Delhi - Doubles - Main |
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| Quarter-finals | Kadhe A./Myneni S. | Carr S./Kotzen A. | 2:0 (6:4, 7:5) | details | 01.04.2021 |
| 1/8-finals | Carr S./Kotzen A. | Dahiya P./Somani P. | 2:0 (6:4, 6:3) | details | 30.03.2021 |
| India: M15 Pune - Doubles - Main |
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| Final | Carr S./Kotzen A. | Castelnuovo L./Kadhe A. | 0:2 (4:6, 5:7) | details | 27.03.2021 |
| Semi-finals | Carr S./Kotzen A. | Khan Z./Svrcina D. | 2:1 (6:4, 3:6, 10:7) | details | 26.03.2021 |
| Quarter-finals | Qamar F./Sunish D. | Carr S./Kotzen A. | 1:2 (7:5, 1:6, 6:10) | details | 25.03.2021 |
| 1/8-finals | Carr S./Kotzen A. | Sood Ch./Sood L. | 2:0 (6:4, 7:5) | details | 23.03.2021 |
Estonia: M15 Parnu - Singles - Main