Stadium: Court 2 Round: 28 Ground: Hardcourt outdoor
| ITF M15 Edwardsville | 2021/07/23 14:00 | Paul Jubb v Christian Langmo | 3-6,2-6 |
| ITF M15 Edwardsville | 2021/07/22 14:20 | Takeuchi, Kento (1987) v Christian Langmo | 5-7,1-6 |
| ITF M15 Edwardsville | 2021/07/21 19:25 | Seelig, Kyle v Christian Langmo | 3-6,3-6 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/03 17:15 | Stefan Kozlov v Christian Langmo | 6-2,7-5 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/02 20:50 | Christian Langmo v Quiroz, Roberto | 6-3,3-6,12-10 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/01 13:00 | Sigouin, Benjamin v Christian Langmo | 6-4,3-6,0-6 |
| ITF M15 Champaign | 2021/06/25 18:50 | Jason Kubler v Christian Langmo | 6-4,6-1 |
| ITF M15 Champaign | 2021/06/24 22:40 | Farren, Connor v Christian Langmo | 4-6,4-6 |
| ITF M15 Edwardsville | 2021/07/23 15:35 | Strong Kirchheimer v Eliot Spizzirri | 6-2,6-0 |
| ITF M15 Edwardsville | 2021/07/21 16:00 | Strong Kirchheimer v Stalder, Reese | 7-6,7-6 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/03 00:00 | Murkel Dellien v Strong Kirchheimer | 6-7,6-7 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/01 21:55 | Blumberg, William v Strong Kirchheimer | 3-6,3-6 |
| ITF M15 Champaign | 2021/06/23 15:00 | Strong Kirchheimer v Farren, Connor | 3-6,4-6 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/16 17:10 | Strong Kirchheimer v Hidalgo, Diego | 7-6,2-6,3-6 |
| Orlando, USA | 2021/06/06 16:20 | Strong Kirchheimer v Nicolas Alvarez | 3-6,5-7 |
| Challenger - Little Rock | 2021/05/31 15:00 | Stefan Kozlov v Strong Kirchheimer | 6-3,6-2 |