Stadium: Court 1 Round: 24 Ground: Hardcourt outdoor
| Challenger Fairfield | 2018/10/07 18:20 | King, Kevin v Nguyen, Daniel | 6-2,6-0 |
| ITF Canada F6 | 2017/09/08 14:30 | Nguyen, Daniel v King, Kevin | 6-7,5-7 |
| Challenger - Sarasota | 2019/04/15 18:40 | Nguyen, Daniel v Shane, Ryan | 6-7,5-7 |
| Zhangjiagang, China | 2019/03/19 05:45 | Nguyen, Daniel v Lorenzo Giustino | 0-6,3-6 |
| Zhangjiagang, China | 2019/03/18 03:55 | Banes, Maverick v Nguyen, Daniel | 4-6,3-6 |
| Challenger Yokohama | 2019/02/26 03:30 | Sugita, Yuichi v Nguyen, Daniel | 2-6,6-4,7-5 |
| Challenger Yokohama | 2019/02/25 04:10 | Blake Ellis v Nguyen, Daniel | 6-3,5-7,5-7 |
| Challenger - Morelos | 2019/02/18 21:15 | Lopez Villasenor, Gerardo v Nguyen, Daniel | 6-3,6-3 |
| Challenger - Chennai | 2019/02/04 04:30 | Nguyen, Daniel v Daniel Altmaier | 3-6,2-6 |
| Challenger Launceston | 2019/01/29 02:35 | Pedro Martinez v Nguyen, Daniel | 7-5,7-6 |
| Challenger - Gwangju | 2019/05/13 03:55 | Cem Ilkel v King, Kevin | 7-5,6-2 |
| Challenger - Busan | 2019/05/06 06:50 | Yang, Tsung-Hua v King, Kevin | 6-3,6-4 |
| Puerto Vallarta, Mexico | 2019/05/02 00:00 | Brown, Dustin v King, Kevin | 6-3,3-6,6-4 |
| Puerto Vallarta, Mexico | 2019/04/29 22:40 | Crepatte, Baptiste v King, Kevin | 1-6,4-6 |
| Challenger Leon | 2019/04/22 18:35 | Escobar, Gonzalo v King, Kevin | 6-7,7-6,6-2 |
| Challenger - San Luis Potosí | 2019/04/17 19:40 | Alexander Bublik v King, Kevin | 6-4,6-3 |
| Challenger - San Luis Potosí | 2019/04/15 19:40 | King, Kevin v King, Evan | 7-6,6-7,6-3 |
| Monterrey, Mexico | 2019/04/03 17:00 | Mitchell Krueger v King, Kevin | 7-6,6-3 |