| Masters da Dinamarca - Duplas Masculinas | 2021/08/06 11:00 | Sondergaard/Toft v Corvee/Labar | L | 1-2 |
| Open da Áustria - Duplas Masculinas | 2021/05/29 11:10 | Chang/Chia v Sondergaard/Toft | L | 2-1 |
| Open da Áustria - Duplas Masculinas | 2021/05/28 15:40 | Sondergaard/Toft v Janacek/Svejda | W | 2-0 |
| Internacional da Eslovénia - Duplas Masculinas | 2021/05/20 17:20 | Sondergaard/Toft v Arif/Haikal | L | 0-2 |
| Portuguese Int. MD | 2021/05/08 11:20 | Lauritzen/Vestergaard v Sondergaard/Toft | L | 2-1 |
| Orleans Masters MD | 2021/03/24 17:10 | Sondergaard/Toft v Kræmer/Rindshøj | L | 1-2 |
| SaarLorLux Open MD | 2020/10/30 13:10 | Sondergaard/Toft v Jansen/Kaesbauer | L | 1-2 |
| SaarLorLux Open MD | 2020/10/29 12:00 | Hess/Pistorius v Sondergaard/Toft | W | 0-2 |
| Internacional de Espanha - Duplas Mistas | 2021/06/18 13:45 | Kargaev/Vorobeva v Duijs/Van Der Aar | L | 2-1 |
| Internacional de Espanha - Duplas Mistas | 2021/06/18 07:00 | Mini/Saponara Rivva v Duijs/Van Der Aar | W | 1-2 |
| Internacional de Espanha - Duplas Mistas | 2021/06/17 11:00 | Perez/Leal v Duijs/Van Der Aar | W | 1-2 |
| Portuguese Int. XD | 2021/05/07 13:50 | Kræmer/Kudsk v Duijs/Van Der Aar | L | 2-1 |
| Open da Polónia - Duplas Masculinas | 2021/03/27 09:00 | Duijs/Van Der Aar v Man/Tee | L | 0-2 |
| Open da Polónia - Duplas Masculinas | 2021/03/26 18:50 | Duijs/Van Der Aar v Tarun/Sharma | W | 2-0 |
| Open da Polónia - Duplas Masculinas | 2021/03/26 18:50 | Duijs/Van Der Aar v Kona/Sharma | W | 2-0 |
| Open da Polónia - Duplas Masculinas | 2021/03/26 12:40 | Orteu/Pham v Duijs/Van Der Aar | W | 1-2 |