Stadium: MTA 05 Round: 62 Ground: Clay
| ITF M15 Monastir | 2023/10/15 09:30 | Ryusuke Horiuchi v Loan Lestir | 3-6,2-6 |
| ITF M25 Takasaki | 2023/09/18 00:55 | Leo Vithoontien v Ryusuke Horiuchi | 6-2,7-6 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Maximus Kawabata v Ryusuke Horiuchi | 1-6,0-6 |
| ITF M25 Sapporo | 2023/09/11 02:30 | Ryusuke Horiuchi v Yusuke Kusuhara | 3-6,6-3,6-10 |
| ITF M25 Sapporo | 2023/09/04 03:35 | Ryusuke Horiuchi v Seiya Nakanishi | 6-4,2-6,10-12 |
| ITF M25 Sapporo | 2023/09/03 03:00 | Ryusuke Horiuchi v Kenta Nakamura | 6-3,6-1 |
| ITF M25 Bolzano | 2023/07/31 13:00 | Juan Bautista Otegui v Ryusuke Horiuchi | 5-7,6-2,6-0 |
| ITF M15 Perugia | 2023/07/23 09:30 | Ryusuke Horiuchi v Giorgio Ricca | 0-6,4-6 |
| ITF M15 Bad Waltersdorf | 2023/10/04 10:05 | Radovan Michalik v David Pichler | 2-6,1-6 |
| ITF M15 Bad Waltersdorf | 2023/10/02 08:00 | Serafin Zund v Radovan Michalik | 4-6,1-6 |
| ITF M15 Arad | 2023/09/26 13:55 | Radovan Michalik v Federico Campana | 3-6,3-6 |
| ITF M15 Arad | 2023/09/25 07:00 | Radovan Michalik v Alan Postay | 6-3,6-4 |
| ITF M15 Arad | 2023/09/24 07:00 | Radovan Michalik v Dominic Ducariu | 4-6,6-4,10-8 |
| ITF M15 Kursumlijska Banja | 2023/09/18 09:30 | Radovan Michalik v Shendrit Deari | 6-4,2-6,10-12 |
| ITF M15 Satu Mare | 2023/09/13 07:00 | Pietro Marino v Radovan Michalik | 5-7,6-2,6-2 |
| ITF M15 Satu Mare | 2023/09/12 09:35 | Radovan Michalik v Andrei Cuceu | 6-1,7-6 |