| UTR Pro Tennis Series - Mülheim | 2021/10/16 08:15 | Constantin Schmitz v Johann Willems | 3-6,1-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/15 11:30 | Eric Vanshelboim v Johann Willems | 2-6,4-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/14 08:30 | Diego Balderas v Johann Willems | 0-6,2-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/12 07:00 | Ivan Marrero Curbelo v Johann Willems | 2-6,3-5 |
| UTR Pro Tennis Series - Mülheim | 2021/10/11 12:15 | Johann Willems v Benjamin Dhoe | 6-2,5-1 |
| UTR Pro Tennis Series - Mülheim | 2021/09/23 09:30 | Johann Willems v Alen Moritz Hodzic | 0-0 |
| UTR Pro Tennis Series - Mülheim | 2021/09/20 08:00 | Johann Willems v Maxence Broville | 0-0 |
| German Premier League | 2020/07/27 17:05 | Paul Valsecchi v Johann Willems | 1-6,7-5,6-2 |
| UTR Pro Tennis Series - Mülheim | 2021/10/16 09:30 | Christian Hansen v Sidane Pontjodikromo | 6-3,3-6,5-2 |
| UTR Pro Tennis Series - Mülheim | 2021/10/15 07:00 | Tom Gentzsch v Christian Hansen | 4-6,1-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/14 07:00 | Quin Verstegen v Christian Hansen | 3-6,6-3,3-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/13 11:30 | Filip Duda v Christian Hansen | 6-2,2-5 |
| UTR Pro Tennis Series - Mülheim | 2021/10/11 08:30 | Alen Moritz Hodzic v Christian Hansen | 6-7,7-6,3-5 |
| ITF - M25 - Meerbusch | 2021/04/13 11:00 | Christian Hansen v Paul Woerner | 2-6,3-6 |
| ITF - M25 - Meerbusch | 2021/04/12 11:30 | Christian Hansen v Hugo Pierre | 6-4,6-7,10-6 |
| ITF - M25 - Meerbusch | 2021/04/12 07:30 | Adrian Obert v Christian Hansen | 6-4,2-6,6-10 |