Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Edwardsville | 2021/07/20 14:00 | Chad Kissell v Nicolas Meister | 6-3,6-2 |
| ITF M15 Edwardsville | 2021/07/19 14:00 | Chad Kissell v John Bernard | 7-6,6-1 |
| ITF M15 Champaign | 2021/06/21 15:00 | Preston Brown v Chad Kissell | 6-4,6-4 |
| ITF M25 Tulsa | 2021/06/14 15:00 | Evan Zhu v Chad Kissell | 7-6,7-6 |
| ITF M25 Wichita | 2021/06/08 15:00 | Chad Kissell v Nicolas Acevedo | 1-6,4-6 |
| ITF M25 Wichita | 2021/06/07 15:00 | Chad Kissell v Parth Aggarwal | 6-3,6-4 |
| ITF M15 St Petersburg | 2021/02/08 08:50 | Chad Kissell v Matic Spec | 3-6,4-6 |
| ITF M15 St Petersburg Qual | 2021/02/07 12:45 | Daniil Glinka v Chad Kissell | 6-2,4-6,8-10 |
| ITF M25 Wichita | 2021/06/12 15:00 | Patrick Kypson v Felix Corwin | 6-3,6-2 |
| ITF M25 Wichita | 2021/06/11 20:20 | Felix Corwin v Genaro Alberto Olivieri | 3-6,6-3,6-4 |
| ITF M25 Wichita | 2021/06/10 19:40 | Felix Corwin v Ezekiel Clark | 3-6,6-3,6-3 |
| ITF M25 Wichita | 2021/06/09 20:55 | Felix Corwin v Wilson Leite | 6-2,2-6,7-6 |
| ITF M15 Heraklion | 2021/05/27 08:00 | Arthur Fery v Felix Corwin | 6-1,3-6,6-2 |
| ITF M15 Heraklion | 2021/05/26 12:40 | Gianmarco Ferrari v Felix Corwin | 3-6,2-6 |
| ITF M15 Heraklion | 2021/05/20 10:25 | Felix Corwin v Dusty H. Boyer | 6-3,3-6,4-6 |
| ITF M15 Heraklion | 2021/05/18 08:00 | Felix Corwin v Kelsey Stevenson | 3-6,6-3,7-5 |