| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Guy Den Heijer v Johann Willems | 7-6,2-6,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 12:00 | Jip Van Assendelft v Johann Willems | 3-6,2-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/02 12:00 | Miko Wassermann v Johann Willems | 2-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 13:30 | Johann Willems v Lawrence Bataljin | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/17 08:30 | Johann Willems v Christian Hansen | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 08:15 | Constantin Schmitz v Johann Willems | 3-6,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/15 11:30 | Eric Vanshelboim v Johann Willems | 2-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 08:30 | Diego Balderas v Johann Willems | 0-6,2-6 |
| ITF M25 Nur-Sultan | 2021/10/28 05:00 | Yan Sabanin v Ivan Liutarevich | 4-6,6-4,6-3 |
| ITF M25 Nur-Sultan | 2021/10/27 06:50 | Jonathan Baron v Ivan Liutarevich | 2-6,2-6 |
| ITF M25 Nur-Sultan | 2021/10/22 05:30 | Filip Peliwo v Ivan Liutarevich | 6-2,6-2 |
| ITF M25 Nur-Sultan | 2021/10/21 05:00 | Ivan Liutarevich v Uladzimir Ignatik | 1-6,6-4,7-5 |
| ITF M25 Nur-Sultan | 2021/10/19 05:05 | Ivan Liutarevich v Ivan Zaytsev | 1-6,6-3,10-4 |
| ITF M25 Nur-Sultan | 2021/10/18 09:35 | Ivan Liutarevich v Arslanbek Aitkulov | 6-1,6-2 |
| ITF M15 Kazan | 2021/10/16 08:00 | Alibek Kachmazov v Ivan Liutarevich | 6-4,6-7,6-4 |
| ITF M15 Kazan | 2021/10/15 10:05 | Sanjar Fayziev v Ivan Liutarevich | 4-6,6-3,6-7 |