Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2019/11/20 19:45 | Volfson, David v Brymer, Gage | 6-3,5-7,3-6 |
| ITF M15 Cancun | 2019/11/17 13:45 | Volfson, David v Paul Jubb | 0-6,3-6 |
| ITF M15 Cancun | 2019/11/16 16:20 | Zhurbin, Alexander v Volfson, David | 1-6,7-5,3-6 |
| ITF M15 Cancun | 2019/11/15 20:35 | Ortlip, Joshua v Volfson, David | 2-6,6-1,1-6 |
| ITF M15 Cancun | 2019/11/14 19:15 | Volfson, David v Christian Langmo | 5-7,6-4,6-3 |
| ITF M15 Cancun | 2019/11/12 14:00 | Volfson, David v Iamachkine, Pedro | 6-0,6-2 |
| ITF M15 Cancun | 2019/11/10 14:00 | Volfson, David v Gonzalez, Javier (Chl) | 7-5,6-3 |
| ITF M15 Cancun | 2019/10/22 16:30 | Estevez Maximiliano v Volfson, David | 6-1,7-6 |
| ITF M15 Cancun | 2019/12/02 15:30 | Dan Martin v Donarski, Sid | 4-6,7-5,10-5 |
| ITF M15 Cancun | 2019/12/01 20:30 | Troche, Emiliano v Donarski, Sid | 5-7,2-6 |
| Rochester, Singles M-ITF-USA-19A | 2019/06/25 19:15 | Mercier, Tyler v Donarski, Sid | 6-3,6-2 |
| Rochester, Singles M-ITF-USA-19A | 2019/06/24 17:00 | Donarski, Sid v Hale, Darryl | 6-0,6-1 |
| ITF M15 Cancun | 2019/04/08 17:30 | Facundo Mena v Donarski, Sid | 6-3,6-1 |
| ITF M15 Cancun | 2019/04/08 13:30 | Donarski, Sid v A.J Catanzariti | 6-2,6-2 |
| ITF Italy F34 | 2018/10/27 12:30 | Senthilkumar, Muthu Aadhitiya v Donarski, Sid | 6-2,6-0 |
| ITF Italy F33 | 2018/10/20 11:00 | Donarski, Sid v Winkler, Georg | 1-6,3-6 |