Stadium: Court 4 Round: 25 Ground: Clay
| ITF M15 Antalya | 2021/06/28 06:30 | Zsombor Velcz v Fletcher Scott | 5-7,1-6 |
| ITF M15 Antalya | 2021/06/23 10:15 | Stefan Palosi v Zsombor Velcz | 6-3,7-6 |
| ITF M15 Sarajevo | 2021/06/02 15:55 | Zsombor Velcz v Domagoj Biljesko | 7-6,2-6,5-7 |
| ITF M15 Kouvola | 2021/05/28 07:15 | Anton Matusevich v Zsombor Velcz | 6-1,6-3 |
| ITF M15 Kouvola | 2021/05/27 12:25 | Joao Victor C Loureiro v Zsombor Velcz | 2-6,6-4,2-6 |
| ITF M15 Kouvola | 2021/05/26 06:00 | Zsombor Velcz v Francesco Vilardo | 6-1,6-4 |
| ITF M15 Sibenik | 2021/05/17 09:30 | Julien Penzlin v Zsombor Velcz | 6-4,6-1 |
| ITF M15 New Delhi | 2021/04/02 05:30 | Zsombor Velcz v Simon Carr | 3-6,6-2,3-6 |
| ITF M15 Poprad | 2021/07/04 11:00 | Martin Krumich v Tomas Lanik | 3-6,3-6 |
| ITF M15 Antalya | 2021/06/16 11:45 | Martin Krumich v Marsel Ilhan | 4-6,3-6 |
| ITF M15 Antalya | 2021/06/12 07:25 | Martin Krumich v Francisco Comesana | 4-6,6-3,4-6 |
| ITF M15 Antalya | 2021/06/11 07:00 | Martin Krumich v Riccardo Balzerani | 6-2,7-5 |
| ITF M15 Antalya | 2021/06/10 10:25 | Christian Lindell v Martin Krumich | 3-6,3-6 |
| ITF M15 Antalya | 2021/06/09 07:00 | Martin Krumich v Zakhar Trapeznikov | 6-1,6-3 |
| ITF M25 Most | 2021/05/25 09:35 | Gijs Brouwer v Martin Krumich | 6-3,5-7,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/20 09:45 | Jiri Lehecka v Martin Krumich | 6-2,6-3 |