Stadium: Court 12 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Doha | 2021/10/06 15:30 | Saketh Myneni v Christian Sigsgaard | 4-6,4-6 |
| ITF - M25 Falun | 2021/09/29 14:50 | Antoine Escoffier v Christian Sigsgaard | 7-5,6-7,6-4 |
| ITF - M25 Falun | 2021/09/28 12:45 | Leo Borg v Christian Sigsgaard | 3-6,4-6 |
| ITF - M25 Falun | 2021/09/26 11:00 | Christian Sigsgaard v Jonathan Backman | 6-1,6-4 |
| Davis Cup | 2021/09/17 14:00 | Christian Sigsgaard v Wishaya Trongcharoenchaikul | 6-3,6-2 |
| ITF - M15 Monastir | 2021/09/11 08:30 | Christian Sigsgaard v Gage Brymer | 4-6,4-6 |
| ITF - M15 Monastir | 2021/09/10 09:45 | Masamichi Imamura v Christian Sigsgaard | 3-6,6-3,3-6 |
| ITF - M15 Monastir | 2021/09/09 09:40 | Christian Sigsgaard v Stuart Parker | 1-6,6-2,6-1 |
| ITF - M15 Doha | 2021/10/06 14:20 | Boris Butulija v Mousa Alkotop | 7-5,3-6,6-1 |
| ITF M15 - Sozopol | 2021/09/15 07:00 | Aleksandre Bakshi v Boris Butulija | 6-1,2-6,7-5 |
| ITF M15 - Caïro | 2021/09/01 14:25 | Maxime Mora v Boris Butulija | 6-0,2-6,6-4 |
| ITF M15 - Bratislava | 2021/08/17 08:00 | Boris Butulija v Tomas Liska | 3-6,1-6 |
| ITF M15 - Bratislava | 2021/08/16 10:30 | Boris Butulija v Martin Machala | 6-0,6-3 |
| ITF M15 - Telavi | 2021/08/02 12:00 | Boris Butulija v Marco De Rossi | 4-6,5-7 |
| ITF M15 - Telavi | 2021/08/02 06:00 | Boris Butulija v Danial Rakhmatullayev | 6-0,6-4 |
| ITF M15 - Telavi | 2021/08/01 06:00 | Boris Butulija v Guy Dagan | 6-3,6-2 |