Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Little Rock | 2021/06/04 18:25 | Ulises Blanch v Emilio Gomez | 2-6,0-6 |
| Challenger Little Rock | 2021/06/03 19:15 | Christopher Eubanks v Ulises Blanch | 4-6,6-7 |
| Challenger Little Rock | 2021/06/02 15:00 | Ulises Blanch v Zachary Svajda | 5-7,6-3,6-3 |
| ATP Parma | 2021/05/22 10:00 | Ulises Blanch v Benjamin Bonzi | 3-6,5-7 |
| Challenger Biella | 2021/05/19 11:40 | Thai-Son Kwiatkowski v Ulises Blanch | 6-4,7-6 |
| Challenger Biella | 2021/05/18 08:30 | Elliot Benchetrit v Ulises Blanch | 4-6,4-6 |
| 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 Little Rock | 2021/06/02 16:30 | Alexander Ritschard v Kevin King | 7-6,4-6,6-4 |
| Challenger Salinas 2 | 2021/04/30 17:40 | Kevin King v Agustin Velotti | 3-6,3-6 |
| Challenger Salinas 2 | 2021/04/29 17:15 | Adrian Menendez-Maceiras v Kevin King | 1-6,6-2,5-7 |
| Challenger Salinas 2 | 2021/04/28 17:00 | Facundo Diaz Acosta v Kevin King | 4-6,3-6 |
| Challenger Salinas | 2021/04/21 16:30 | Thiago Agustin Tirante v Kevin King | 6-1,6-2 |
| Challenger Salinas | 2021/04/19 20:55 | Kevin King v Alejandro Tabilo | 3-6,6-4,6-1 |
| Challenger Orlando | 2021/04/13 15:25 | Zane Khan v Kevin King | 6-3,1-6,6-1 |
| Challenger Orlando | 2021/04/12 20:00 | Roberto Quiroz v Kevin King | 6-7,6-2,6-1 |