Stadium: Court 5 Round: 27 Ground: Hardcourt outdoor
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/20 00:00 | Harrison Adams v Greif, Lukas | 3-6,3-6 |
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/19 00:00 | Greif, Lukas v Graziani, Edoardo | 6-4,7-5 |
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/16 14:00 | Irizarry, Eduardo Neftali v Greif, Lukas | 3-6,2-6 |
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/15 14:00 | Greif, Lukas v Abraham Asaba | 5-7,6-4,10-3 |
| ITF USA F12 | 2018/04/21 14:30 | Greif, Lukas v Alex Hernandez | 1-6,3-6 |
| ITF USA F12 | 2018/04/20 18:00 | Greif, Lukas v Mcmann, Conner | 6-3,6-0 |
| ITF USA F11 | 2018/04/16 14:00 | Greif, Lukas v Rowland Phillips | 5-7,6-7 |
| ITF USA F11 | 2018/04/15 12:00 | Greif, Lukas v Joseph Corse | 6-2,6-0 |
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/20 00:00 | Farren, Connor v Rapp, Austin | 5-7,6-7 |
| Houston, Singles Qualifying M-ITF-USA-28A | 2019/09/19 01:35 | Rapp, Austin v Nicolas Mejia | 4-6,7-6,6-3 |
| ITF M15 Champaign | 2019/09/12 17:30 | Rapp, Austin v Zachary Svajda | 2-6,2-6 |
| ITF M15 Champaign | 2019/09/11 22:05 | Rapp, Austin v Hills, Langford | 6-3,6-4 |
| ITF M25 Memphis | 2019/08/15 18:40 | Ulises Blanch v Rapp, Austin | 6-1,6-2 |
| ITF M25 Memphis | 2019/08/14 15:00 | Zapp, Logan v Rapp, Austin | 1-6,3-6 |
| ITF M25 Memphis | 2019/08/13 19:30 | Rapp, Austin v Redlicki, Martin | 7-6,6-3 |
| ITF M25 Edwardsville | 2019/08/08 16:15 | Felix Corwin v Rapp, Austin | 6-4,6-4 |