Stadium: Court 5 Round: 45 Ground: Hardcourt outdoor
| ITF - M25 Calabasas | 2019/03/18 17:00 | Evan Zhu v Gray, Jonathan | 3-6,2-6 |
| Arcadia, Singles Qualifying M-ITF-USA-09A | 2019/03/12 18:00 | Kohen, Alan v Gray, Jonathan | 6-3,6-3 |
| ITF M15 Faro | 2019/02/26 10:00 | Schmitz, Constantin v Gray, Jonathan | 6-2,6-2 |
| ITF M15 Faro | 2019/02/25 13:20 | Goncalo Falcao v Gray, Jonathan | 2-6,1-6 |
| ITF M25 Glasgow | 2019/02/18 10:45 | Gray, Jonathan v Jakub Paul | 3-6,2-6 |
| Barnstaple, Singles Qualifying M-ITF-GBR-01A | 2019/02/11 13:45 | Gray, Jonathan v Mark Whitehouse | 5-7,6-7 |
| ITF - M15 Monastir | 2019/01/24 11:25 | Gray, Jonathan v Avidzba, Alen | 6-4,3-6,3-6 |
| ITF - M15 Monastir | 2019/01/22 12:25 | Boris Fassbender v Gray, Jonathan | 5-7,4-6 |
| ITF - M25 Calabasas | 2019/03/18 17:00 | Shabaz, Michael v Griffith, William | 7-6,4-6,3-10 |
| ITF - M25 Bakersfield | 2019/03/11 17:00 | Griffith, William v Fox, David | 3-6,6-3,8-10 |
| Tucson, Singles M-ITF-USA-07A | 2019/02/12 19:00 | Griffith, William v Liam Draxl | 3-6,2-6 |
| ITF M15 Claremont | 2019/02/05 20:30 | Nick Chappell v Griffith, William | 7-6,7-5 |
| Challenger Fairfield | 2018/10/06 19:25 | Jan Choinski v Griffith, William | 6-4,7-6 |
| ITF Canada F6 | 2018/09/04 15:40 | Gomez, Alejandro v Griffith, William | 6-2,6-2 |
| Challenger Aptos | 2018/08/04 20:55 | Ward, Alexander v Griffith, William | 7-6,7-6 |
| Challenger Aptos | 2018/08/04 16:00 | Griffith, William v Brogan, Brian | 6-1,6-0 |