Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Rochester | 2023/07/18 22:30 | Rafael Tosetto v Leo Vithoontien | 7-6,3-6,6-3 |
| ITF M25 Laval | 2023/07/15 13:55 | James Tracy v Leo Vithoontien | 6-3,6-2 |
| ITF M25 Laval | 2023/07/14 16:00 | Tristan McCormick v Leo Vithoontien | 4-6,5-7 |
| ITF M25 Laval | 2023/07/13 16:00 | Leo Vithoontien v Taha Baadi | 5-7,6-4,6-4 |
| ITF M25 Laval | 2023/07/11 16:40 | Leo Vithoontien v David Saye | 6-1,6-2 |
| ITF M25 Santo Domingo | 2023/06/27 12:55 | Leo Vithoontien v Angel Diaz Jalil | 6-3,4-6,11-13 |
| ITF M25 Santo Domingo | 2023/06/26 15:00 | Leo Vithoontien v Christopher Li | 3-6,6-2,10-7 |
| ITF M15 Santo Domingo | 2023/06/22 17:10 | Justin Boulais v Leo Vithoontien | 6-3,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/07/15 02:00 | Kasidit Samrej v Jeamoon Lee | 6-7,5-7 |
| ITF M15 Nakhon Si Thammarat | 2023/07/14 02:00 | Kasidit Samrej v Takuya Kumasaka | 6-1,6-3 |
| ITF M15 Nakhon Si Thammarat | 2023/07/13 02:00 | Kasidit Samrej v Manish Sureshkumar | 6-3,6-3 |
| ITF M15 Nakhon Si Thammarat | 2023/07/12 03:35 | Sanhui Shin v Kasidit Samrej | 4-6,4-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/08 02:00 | Maximus Jones v Kasidit Samrej | 6-7,6-4,7-5 |
| ITF M15 Nakhon Si Thammarat | 2023/07/06 03:00 | Kasidit Samrej v Jeamoon Lee | 7-6,7-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/05 02:00 | Kasidit Samrej v Takuya Kumasaka | 6-3,6-2 |
| ITF M25 Nakhon Si Thammarat | 2023/06/18 02:00 | Kasidit Samrej v Hiroki Moriya | 6-2,2-6,2-6 |