Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| ITF M25 Hamburg | 2021/10/17 14:50 | Benjamin Dhoe v Tim Sandkaulen | 6-7,6-2,5-10 |
| ITF M25 Hamburg | 2021/10/17 11:10 | Alen Moritz Hodzic v Tim Sandkaulen | 6-7,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 08:00 | Tim Sandkaulen v Eric Vanshelboim | 0-0 |
| UTR Pro Tennis Series Mulheim | 2021/10/15 08:30 | Yurii Dzhavakian v Tim Sandkaulen | 0-0 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 13:00 | Edison Ambarzumjan v Tim Sandkaulen | 3-6,0-5 |
| UTR Pro Tennis Series Mulheim | 2021/10/13 10:00 | Jing L Weng v Tim Sandkaulen | 3-6,2-5 |
| UTR Pro Tennis Series Mulheim | 2021/10/11 07:00 | Constantin Schmitz v Tim Sandkaulen | 6-4,7-5 |
| UTR Pro Tennis Series Mulheim | 2021/07/31 08:30 | Hazem Naw v Tim Sandkaulen | 6-4,7-6 |
| ITF M25 Falun | 2021/09/28 10:55 | Leopold Zima v Marvin Moeller | 6-3,6-3 |
| ITF M25 Jonkoping | 2021/09/23 08:00 | Marvin Moeller v Viktor Durasovic | 7-5,3-6,4-6 |
| ITF M25 Jonkoping | 2021/09/22 09:45 | Marvin Moeller v Tibo Colson | 6-2,3-6,6-3 |
| ITF M25 Jonkoping | 2021/09/21 09:20 | Marvin Moeller v Harry Wendelken | 4-6,7-5,6-1 |
| ITF M25 Plaisir | 2021/09/16 07:55 | Vasil Kirkov v Marvin Moeller | 2-6,7-6,7-6 |
| ITF M25 Plaisir | 2021/09/14 10:50 | Lisandru Rodriguez v Marvin Moeller | 1-6,0-6 |
| ITF M25 Trier | 2021/08/28 15:00 | Tim Handel v Marvin Moeller | 7-5,2-6,6-2 |
| ITF M25 Trier | 2021/08/27 12:00 | Marvin Moeller v Mick Veldheer | 6-3,6-3 |