Stadium: Court 10 Round: 54 Ground: Hardcourt indoor
| ITF M25 Edmonton | 2023/10/29 23:20 | Nicolas Kotzen v Collin Hyte | 6-0,6-1 |
| UTR Pro Columbus | 2023/08/19 13:00 | Eric Li v Nicolas Kotzen | 6-2,2-6,7-6 |
| UTR Pro Columbus | 2023/08/18 15:30 | Nicolas Kotzen v Zach Fuchs | 3-6,7-6,6-4 |
| UTR Pro Columbus | 2023/08/17 19:02 | Nicolas Kotzen v Alex Bancila | 7-5,6-7,6-4 |
| UTR Pro Columbus | 2023/08/16 17:00 | Reece Yakubov v Nicolas Kotzen | 6-7,1-6 |
| UTR Pro Columbus | 2023/08/15 15:30 | Alex Kobelt v Nicolas Kotzen | 3-6,6-7 |
| ITF M25 Southaven | 2023/08/09 22:10 | Aidan Mchugh v Nicolas Kotzen | 6-4,6-7,6-1 |
| ITF M25 Southaven | 2023/08/08 14:00 | Henrik Wiersholm v Nicolas Kotzen | 6-1,3-6,8-10 |
| ITF M25 Edmonton | 2023/10/29 23:05 | Calvin Thalheimer v Eloi Roux | 6-4,6-4 |
| ITF M15 Monastir | 2023/10/01 08:00 | Calvin Thalheimer v Carl Holder | 1-6,1-6 |
| ITF M15 Monastir | 2023/09/25 08:30 | Calvin Thalheimer v Shivank Bhatnagar | 2-6,3-6 |
| ITF M15 Monastir | 2023/09/24 10:30 | Calvin Thalheimer v Hippolyte Costa | 7-6,6-2 |
| ITF M15 Monastir | 2023/05/14 08:30 | Calvin Thalheimer v Mohamed Ali Abibsi | 4-6,2-6 |
| ITF M15 Monastir | 2023/05/09 09:00 | Calvin Thalheimer v Shuannon Tricerri | 3-6,1-6 |
| ITF M15 Monastir | 2023/05/07 08:30 | Calvin Thalheimer v Anthony Shumsky | 7-6,6-0 |
| ITF M15 Alaminos-Larnaca | 2023/04/23 07:00 | Markus Wunder v Calvin Thalheimer | 6-0,6-1 |