Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ATP Miami | 2021/03/22 17:10 | Thai-Son Kwiatkowski v Alejandro Tabilo | 3-6,4-6 |
| Challenger Cleveland | 2021/03/15 23:05 | Thai-Son Kwiatkowski v Bjorn Fratangelo | 4-6,2-6 |
| ATP Singapore | 2021/02/24 04:00 | Soonwoo Kwon v Thai-Son Kwiatkowski | 4-6,6-3,6-4 |
| ATP Singapore | 2021/02/21 04:00 | Thai-Son Kwiatkowski v Robert Galloway | 6-2,6-3 |
| ATP Singapore | 2021/02/20 04:10 | Thai-Son Kwiatkowski v Luke Bambridge | 6-4,7-6 |
| Challenger Biella | 2021/02/15 09:30 | Thai-Son Kwiatkowski v Blaz Kavcic | 6-2,3-6,2-6 |
| Challenger Biella Qual | 2021/02/14 09:00 | Thai-Son Kwiatkowski v Evgeny Karlovskiy | 7-6,7-6 |
| Challenger Biella | 2021/02/08 14:40 | Thai-Son Kwiatkowski v Blaz Rola | 3-6,2-6 |
| ATP Miami | 2021/03/22 19:55 | Damir Dzumhur v Ulises Blanch | 7-6,6-4 |
| Challenger Nur-Sultan | 2021/03/01 06:15 | Ulises Blanch v Alibek Kachmazov | 2-6,6-4,3-6 |
| Challenger Nur-Sultan Qual | 2021/02/28 05:20 | Ulises Blanch v Yan Bondarevskiy | 7-6,6-3 |
| Challenger Nur-Sultan | 2021/02/24 11:10 | Martin Klizan v Ulises Blanch | 6-7,6-2,7-6 |
| 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 |