Stadium: Court 1N Round: 27 Ground: Hardcourt outdoor
| ITF M15 Champaign | 2021/09/16 17:00 | Nathan Ponwith v Blaise Bicknell | 6-2,6-4 |
| ITF M15 Champaign | 2021/09/15 19:40 | Ryan Shane v Nathan Ponwith | 5-7,2-6 |
| ITF M25 Decatur | 2021/08/04 18:45 | Yunseong Chung v Nathan Ponwith | 6-2,6-1 |
| ITF M25 Decatur | 2021/08/03 16:20 | Alexander Petrov v Nathan Ponwith | 2-6,4-6 |
| ITF M25 Decatur | 2021/08/02 15:00 | Toby D. Boyer v Nathan Ponwith | 1-6,3-6 |
| ITF M25 Champaign | 2021/07/28 21:45 | Naoki Nakagawa v Nathan Ponwith | 4-6,7-5,6-2 |
| ITF M25 Champaign | 2021/07/27 17:05 | Nathan Ponwith v Jibril Nettles | 7-5,6-2 |
| ITF M25 Champaign | 2021/07/26 15:00 | Nathan Ponwith v Ozan Baris | 7-6,6-2 |
| ITF M15 Champaign | 2021/09/16 17:30 | Tyler Zink v Martin Damm | 6-7,4-6 |
| ITF M15 Champaign | 2021/09/15 20:45 | Perry Gregg v Martin Damm | 5-7,0-6 |
| ITF M25 Champaign | 2021/07/28 19:10 | Martin Damm v Jumpei Yamasaki | 6-7,6-7 |
| ITF M15 Edwardsville | 2021/07/21 22:10 | Martin Damm v Cannon Kingsley | 3-6,4-6 |
| ITF M25 Klosters | 2021/06/22 08:30 | Martin Damm v Henry V-D Schulenburg | 4-6,4-6 |
| ITF M15 Skopje | 2021/06/11 10:30 | Martin Damm v Simone Roncalli | 3-6,0-6 |
| ITF M15 Skopje | 2021/06/10 10:30 | Martin Damm v Stefan Micov | 6-4,3-6,6-2 |
| ITF M15 Skopje | 2021/06/09 10:50 | Marko Tepavac v Martin Damm | 5-7,3-6 |