Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Antalya | 2021/12/10 11:10 | Tadas Babelis v Denis Klok | 4-6,7-6,7-6 |
| ITF M15 Antalya | 2021/12/10 07:40 | Koray Kirci v Denis Klok | 5-7,4-6 |
| ITF M15 Antalya | 2021/12/09 08:10 | Mikhail Fufygin v Denis Klok | 4-6,3-6 |
| ITF M15 Nules | 2021/11/16 12:15 | Denis Klok v Carlos Sanchez Jover | 4-6,1-6 |
| ITF M15 Antalya | 2021/11/03 13:05 | Mircea-Alexandru Jecan v Denis Klok | 6-2,6-1 |
| ITF M15 Antalya | 2021/10/27 11:35 | Marlon Vankan v Denis Klok | 6-0,6-0 |
| ITF M15 Antalya | 2021/10/18 12:45 | Denis Klok v Radovan Michalik | 1-6,0-6 |
| ITF M15 Antalya | 2021/10/17 07:00 | Denis Klok v Sven Corbinais | 6-4,6-4 |
| ITF M15 Antalya | 2021/12/09 07:50 | Bogdan Ionut Apostol v Paul Woerner | 6-2,6-2 |
| ITF M25 Frankfurt am Main | 2021/08/10 10:30 | Paul Woerner v Giovanni Oradini | 5-7,5-7 |
| ITF M25 Frankfurt am Main | 2021/08/09 14:15 | Paul Woerner v Patrick Zahraj | 6-4,6-7,10-7 |
| ITF M15 Parnu | 2021/08/04 15:10 | Paul Woerner v Benjamin Lock | 2-6,4-6 |
| ITF M25 Marburg | 2021/07/06 12:15 | Paul Woerner v Sidane Pontjodikromo | 3-6,5-7 |
| ITF M25 Marburg | 2021/07/05 08:00 | Paul Woerner v Zura Tkemaladze | 6-3,5-7,10-7 |
| ITF M25 Bourg-en-Bresse | 2021/06/30 16:30 | Paul Woerner v Ugo Blanchet | 2-6,2-6 |
| ITF M25 Bourg-en-Bresse | 2021/06/29 10:10 | Paul Woerner v Nazim Makhlouf | 6-3,6-2 |