Stadium: Eve Zimmerman Court Round: 54 Ground: Hardcourt outdoor
| Challenger Fairfield | 2018/10/07 18:20 | Kevin King v Daniel Nguyen | 6-2,6-0 |
| Challenger Fairfield | 2018/10/06 20:30 | Kevin King v Sekou Bangoura | 6-4,4-6,6-3 |
| Challenger Monterrey | 2018/10/02 18:00 | Kevin King v Roberto Cid Subervi | 4-6,6-2,4-6 |
| Challenger Cary | 2018/09/11 17:25 | James Duckworth v Kevin King | 4-6,6-4,6-3 |
| US Open | 2018/08/21 16:35 | Kevin King v Ruben Bemelmans | 4-6,3-6 |
| Challenger Vancouver | 2018/08/14 20:55 | Borna Gojo v Kevin King | 6-4,6-3 |
| Challenger Aptos | 2018/08/07 20:55 | Kevin King v Aleksandar Vukic | 1-6,3-6 |
| Challenger Winnetka | 2018/07/11 16:20 | Dayne Kelly v Kevin King | 6-4,6-1 |
| Challenger Fairfield | 2018/10/07 18:15 | Thai-Son Kwiatkowski v Frederik Nielsen | 7-6,3-6,5-7 |
| Challenger Fairfield | 2018/10/06 22:15 | Frederik Nielsen v Roberto Ortega-Olmedo | 6-2,6-2 |
| Challenger Stockton | 2018/09/29 23:05 | Alexander Ritschard v Frederik Nielsen | 6-4,7-6 |
| Challenger Tiburon | 2018/09/22 18:15 | Frederik Nielsen v Alexander Sarkissian | 4-6,5-7 |
| Challenger Cary | 2018/09/08 18:20 | Frederik Nielsen v Evan Song | 2-6,6-7 |
| Challenger Chicago | 2018/09/02 22:00 | Kaichi Uchida v Frederik Nielsen | 6-3,6-4 |
| Challenger Chicago | 2018/09/02 15:00 | Joris De Loore v Frederik Nielsen | 6-7,6-2,5-7 |
| Challenger Portoroz | 2018/08/07 08:00 | Lucas Miedler v Frederik Nielsen | 6-3,6-2 |