Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| ITF USA F19B | 2018/07/18 17:50 | Dunbar, Jacob v Nick Chappell | 6-4,2-6,5-7 |
| ITF M15 Cancun | 2019/05/23 13:30 | Matija Pecotic v Nick Chappell | 6-0,6-1 |
| ITF M15 Cancun | 2019/05/22 16:05 | Shamma, Nicholas v Nick Chappell | 4-6,2-6 |
| ITF M15 Cancun | 2019/05/14 13:30 | Brugnerotto, Marco v Nick Chappell | 4-6,7-5,7-5 |
| ITF - M25 Pensacola | 2019/05/08 14:00 | Gomez, Alejandro v Nick Chappell | 6-1,6-3 |
| Vero Beach, Fl, Singles Qualifying M-ITF-USA-17A | 2019/05/02 17:30 | Nick Chappell v Nicolas Alvarez | 6-7,1-6 |
| Vero Beach, Fl, Singles Qualifying M-ITF-USA-17A | 2019/05/02 14:00 | Isaiah Strode v Nick Chappell | 4-6,6-7 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/26 03:40 | Nick Chappell v Purcell, Rhett | 4-6,6-7 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/20 05:05 | Singh, Karunuday v Nick Chappell | 6-4,6-4 |
| ITF - M25 Wichita | 2019/06/14 15:00 | Dunbar, Jacob v Evan Zhu | 3-6,6-7 |
| ITF - M25 Wichita | 2019/06/13 15:00 | Redlicki, Martin v Dunbar, Jacob | 4-6,6-7 |
| ITF - M25 Wichita | 2019/06/12 15:00 | Stalder, Reese v Dunbar, Jacob | 0-6,3-6 |
| ITF - M25 Calabasas | 2019/03/18 17:00 | Dunbar, Jacob v Ryan Peniston | 2-6,3-6 |
| ITF - M25 Bakersfield | 2019/03/13 21:55 | Dunbar, Jacob v Watson, Andrew | 6-4,1-6,3-6 |
| ITF - M25 Bakersfield | 2019/03/12 17:00 | Dunbar, Jacob v Brandon Perez | 6-1,6-0 |
| ITF - M25 Bakersfield | 2019/03/11 17:00 | Dunbar, Jacob v Moser, Jeremy | 6-1,6-3 |
| ITF M25 Weston | 2019/01/28 14:30 | Dunbar, Jacob v Obert, Adrian | 4-6,2-6 |