Stadium: Court 4 Round: 164 Ground: Hardcourt outdoor
| Challenger Seoul Qual | 2017/05/07 01:30 | Sarmiento, Raymond v Nguyen, Daniel | 6-3,6-7,2-6 |
| Winston-Salem, USA | 2019/08/17 20:00 | Christopher Eubanks v Sarmiento, Raymond | 6-3,3-6,4-6 |
| Challenger Lexington | 2019/07/30 17:45 | Evgeny Karlovskiy v Sarmiento, Raymond | 7-6,6-3 |
| Challenger Lexington | 2019/07/29 22:00 | Sarmiento, Raymond v Redlicki, Martin | 7-6,6-1 |
| Binghamton, USA | 2019/07/24 13:30 | Sarmiento, Raymond v Max Purcell | 6-7,7-6,6-7 |
| Binghamton, USA | 2019/07/23 15:30 | Uzhylovsky, Vladimir v Sarmiento, Raymond | 3-6,6-3,2-6 |
| Winnetka, USA | 2019/07/08 21:15 | Sarmiento, Raymond v Smith, Roy | 7-6,4-6,0-6 |
| Challenger Columbus | 2019/06/12 19:55 | Torpegaard, Mikael v Sarmiento, Raymond | 6-4,7-5 |
| Challenger Columbus | 2019/06/11 14:00 | Alvarez, Nicolas v Sarmiento, Raymond | 6-7,6-7 |
| Winston-Salem, USA | 2019/08/17 19:40 | Nguyen, Daniel v Arevalo-Gonzalez, Marcelo | 6-4,4-6,7-6 |
| ITF M25 Memphis | 2019/08/16 20:00 | Roberto Cid Subervi v Nguyen, Daniel | 6-4,4-6,6-2 |
| ITF M25 Memphis | 2019/08/15 23:00 | King, Kevin v Nguyen, Daniel | 4-6,3-6 |
| ITF M25 Memphis | 2019/08/14 15:00 | Caruana, Liam v Nguyen, Daniel | 4-6,6-7 |
| Challenger Winnipeg | 2019/07/13 17:00 | Schnur, Brayden v Nguyen, Daniel | 6-2,7-5 |
| Challenger Winnipeg | 2019/07/12 17:00 | Nguyen, Daniel v Antoine Hoang | 7-6,4-6,6-3 |
| Challenger Winnipeg | 2019/07/11 16:00 | Nguyen, Daniel v Enzo Couacaud | 1-6,6-3,6-2 |
| Challenger Winnipeg | 2019/07/09 17:30 | Alexis Galarneau v Nguyen, Daniel | 6-1,1-6,5-7 |