Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Nur-Sultan | 2021/02/22 09:30 | Martin Klizan v Timofey Skatov | 6-4,4-6,7-6 |
| Challenger Biella | 2021/02/17 17:05 | Martin Klizan v Andreas Seppi | 6-7,3-6 |
| Challenger Biella | 2021/02/15 14:35 | Bernabe Zapata Miralles v Martin Klizan | 6-7,4-6 |
| Challenger Biella | 2021/02/09 10:50 | Martin Klizan v Illya Marchenko | 2-6,6-7 |
| Australian Open | 2021/01/10 11:45 | Felipe Meligeni Rodrigues Alves v Martin Klizan | 6-1,6-4 |
| Challenger Ortisei | 2020/11/19 13:20 | Martin Klizan v Tomas Machac | 4-6,2-6 |
| Challenger Ortisei | 2020/11/17 13:50 | Martin Klizan v Giulio Zeppieri | 6-1,6-3 |
| ATP Sofia | 2020/11/09 12:10 | Martin Klizan v Adrian Mannarino | 6-3,1-6,5-7 |
| Challenger Nur-Sultan | 2021/02/23 07:15 | Dmitry Popko v Ulises Blanch | 4-6,6-2,6-7 |
| Challenger Potchefstroom | 2021/02/17 10:30 | Teymuraz Gabashvili v Ulises Blanch | 6-4,1-6,6-3 |
| Challenger Potchefstroom | 2021/02/16 08:00 | Ulises Blanch v Peter Polansky | 7-6,6-3 |
| Challenger Potchefstroom | 2021/02/09 14:45 | Jay Clarke v Ulises Blanch | 6-7,4-6 |
| Australian Open | 2021/01/12 09:25 | Ulises Blanch v Viktor Troicki | 5-7,3-6 |
| Australian Open | 2021/01/10 09:15 | Andrey Kuznetsov v Ulises Blanch | 4-6,1-6 |
| Challenger Orlando | 2020/11/17 15:00 | Ulises Blanch v Alexander Ritschard | 4-6,3-6 |
| Challenger Cary | 2020/11/09 17:10 | Dmitry Popko v Ulises Blanch | 6-3,6-2 |