Stadium: Court 2 Round: 25 Ground: Clay
| Challenger Columbus | 2022/01/25 15:00 | Nick Hardt v Harrison, Ryan | 6-4,7-6 |
| Challenger Columbus | 2022/01/24 15:00 | Young, Donald v Harrison, Ryan | 6-3,1-6,3-6 |
| Challenger Columbus | 2022/01/23 16:40 | Harrison, Ryan v Pervolarakis, Michail | 7-5,6-1 |
| ITF M15 Naples | 2021/10/10 14:00 | Cornut-Chauvinc, Antoine v Harrison, Ryan | 3-6,5-7 |
| ITF M15 Naples | 2021/10/09 14:00 | Damien Wenger v Harrison, Ryan | 3-6,5-7 |
| ITF M15 Naples | 2021/10/08 14:30 | Peter Bertran v Harrison, Ryan | 3-6,1-6 |
| ITF M15 Naples | 2021/10/07 15:35 | Juncheng Shang v Harrison, Ryan | 3-6,2-6 |
| ITF M15 Naples | 2021/10/06 19:25 | Louroi Martinez v Harrison, Ryan | 6-7,3-6 |
| ITF M15 Naples | 2022/02/16 16:05 | Murkel Dellien v Alexander Bernard | 6-4,2-6,2-6 |
| ITF M15 Naples | 2022/02/13 18:00 | Pedro Boscardin Dias v Murkel Dellien | 6-3,7-6 |
| ITF M15 Naples | 2022/02/12 15:00 | Baker, Blu v Murkel Dellien | 6-3,3-6,5-7 |
| ITF M15 Naples | 2022/02/11 14:55 | Murkel Dellien v Kirkov, Vasil | 6-4,6-4 |
| ITF M15 Naples | 2022/02/10 17:50 | Murkel Dellien v Karl Friberg | 6-2,6-2 |
| ITF M15 Naples | 2022/02/09 17:00 | Murkel Dellien v Abraham Asaba | 6-4,6-2 |
| ITF M25 Campos do Jordao | 2022/02/04 18:35 | Fernando Yamacita v Murkel Dellien | 7-6,7-5 |
| ITF M25 Campos do Jordao | 2022/02/01 19:20 | Nusdeo, Joao Marcos v Murkel Dellien | 3-6,1-6 |