Stadium: Court 9 Round: 25 Ground: Clay
| Orlando, USA | 2021/06/06 14:00 | Harrison, Ryan v Nick Chappell | 2-6,6-7 |
| Challenger - Little Rock | 2021/05/31 21:00 | Goncalo Oliveira v Harrison, Ryan | 7-5,7-6 |
| Challenger - Tallahassee | 2021/04/21 19:00 | Harrison, Ryan v Michael Mmoh | 4-6,3-6 |
| Challenger - Tallahassee | 2021/04/20 14:00 | Harrison, Ryan v Young, Donald | 2-6,6-3,6-3 |
| ATP - Delray Beach | 2021/01/07 19:30 | Gianluca Mager v Harrison, Ryan | 3-6,6-1,6-4 |
| ATP - Acapulco | 2020/02/23 01:00 | Daniel Altmaier v Harrison, Ryan | 6-2,6-3 |
| ATP - Delray Beach | 2020/02/19 17:30 | Soonwoo Kwon v Harrison, Ryan | 6-4,3-6,7-6 |
| ATP - Delray Beach | 2020/02/17 17:45 | Harrison, Ryan v Damir Dzumhur | 6-3,6-2 |
| ITF - M15 Monastir | 2021/01/12 09:00 | Jomby, Tom v Takeuchi, Kento (1987) | 6-2,5-7,1-6 |
| ITF - M15 Monastir | 2021/01/06 08:00 | Jomby, Tom v Luigi Castelletti | 4-6,6-4,4-6 |
| Eastern European Championship | 2020/11/26 12:30 | Jomby, Tom v Dica , Nini Gabriel | 6-4,6-2 |
| Eastern European Championship | 2020/11/24 17:10 | Jomby, Tom v Hermans, Mats | 6-1,6-0 |
| Eastern European Championship | 2020/11/23 11:10 | Jomby, Tom v Altuna, Tuna | 6-0,6-4 |
| Eastern European Championship | 2020/11/20 09:40 | Jomby, Tom v Brkic, Tomislav | 0-6,3-6 |
| Eastern European Championship | 2020/11/18 10:05 | Jomby, Tom v Madaras, Dragos Nicolae | 3-6,0-6 |
| Eastern European Championship | 2020/11/17 09:30 | Jomby, Tom v Kijametovic, Aziz | 1-6,4-6 |