Stadium: Court 5 Round: 62 Ground: Clay
| UTR Pro Tennis Series Mulheim | 2021/10/17 08:30 | Quin Verstegen v Jose Antonio Rodriguez Rodriguez | 6-3,6-4 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 14:00 | Quin Verstegen v Diego Balderas | 6-0,4-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 07:00 | Quin Verstegen v Christian Hansen | 3-6,6-3,3-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/13 11:30 | Quin Verstegen v Tom Gentzsch | 4-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/12 12:30 | Quin Verstegen v Alen Moritz Hodzic | 6-7,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/11 08:30 | Quin Verstegen v Filip Duda | 6-2,3-6,5-4 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Quin Verstegen v Victor Ernaelsteen | 0-6,5-7 |
| ITF M15 Monastir | 2021/01/10 08:30 | Matteo Tinelli v Quin Verstegen | 7-5,7-6 |
| ITF M15 Oberhaching | 2022/02/13 16:00 | Valentin Guenther v Milan Welte | 6-2,6-2 |
| ITF M15 Oberhaching | 2022/02/13 08:00 | Laurin Aerne v Milan Welte | 3-6,3-6 |
| German Championship | 2021/12/09 10:00 | Milan Welte v Luca Gelhardt | 4-6,6-3,6-6 |
| German Championship | 2021/12/08 09:00 | Thomas Jan Dafcik v Milan Welte | 2-6,3-6 |
| ITF M25 Villers Les Nancy | 2021/11/09 12:05 | Antoine Monaco v Milan Welte | 6-1,6-7,6-2 |
| ITF M25 Sarreguemines | 2021/10/27 14:00 | Calvin Hemery v Milan Welte | 6-4,6-2 |
| ITF M25 Hamburg | 2021/10/19 11:25 | Henri Squire v Milan Welte | 6-2,6-2 |
| ITF M25 Hamburg | 2021/10/17 13:15 | Milan Welte v Ben Jones | 6-4,6-4 |