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