Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| 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 |
| ITF M15 Lakewood | 2022/07/10 18:30 | Calvin Thalheimer v Kyle Overmyer | 4-6,3-6 |
| ITF Canada F4 | 2018/06/28 00:00 | Samuel Shropshire v Calvin Thalheimer | 6-2,6-2 |
| ITF Canada F3 | 2017/06/29 02:35 | Alexander Day v Calvin Thalheimer | 6-3,6-3 |
| ITF Canada F4 | 2016/06/29 23:05 | Calvin Thalheimer v Riaan Du Toit | 1-6,2-6 |
| ITF M25 Montreal | 2023/03/13 17:05 | Eloi Roux v Tommaso Carnevale-Miino | 0-6,0-6 |
| ITF M25 Saint-Augustin | 2022/10/24 14:00 | Christian Lakoseljac v Eloi Roux | 6-1,6-1 |