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