Stadium: Eve Zimmerman Court Round: 54 Ground: Hardcourt outdoor
| French Open Qual | 2018/05/22 08:00 | Kevin King v Andrej Martin | 2-6,5-7 |
| Challenger Puerto Vallarta | 2018/05/05 00:30 | Adrian Menendez-Maceiras v Kevin King | 3-6,6-0,7-5 |
| Challenger Puerto Vallarta | 2018/05/04 01:55 | Kevin King v Roberto Quiroz | 6-2,7-5 |
| Challenger Puerto Vallarta | 2018/05/02 19:00 | Kevin King v Tigre Hank | 6-3,6-2 |
| Challenger Puerto Vallarta | 2018/05/01 17:00 | Kevin King v Nicolaas Scholtz | 6-3,6-1 |
| Challenger Leon | 2018/04/24 15:00 | Kevin King v Roberto Cid Subervi | 2-6,2-6 |
| Challenger Guadalajara | 2018/04/17 20:55 | Kevin King v Brayden Schnur | 6-2,3-6,3-6 |
| ATP Miami Qual | 2018/03/19 16:40 | Rogerio Dutra Silva v Kevin King | 6-2,5-7,6-2 |
| Challenger Loughborough | 2018/05/22 12:30 | Frederik Nielsen v David Guez | 2-6,4-6 |
| Challenger Loughborough Qual | 2018/05/21 09:30 | Johannes Haerteis v Frederik Nielsen | 6-7,1-6 |
| Challenger Loughborough Qual | 2018/05/20 09:30 | Simon Carr v Frederik Nielsen | 3-6,4-6 |
| Challenger Loughborough Qual | 2018/05/19 09:00 | Remi Boutillier v Frederik Nielsen | 7-6,6-7,1-6 |
| Challenger Busan Qual | 2018/05/14 03:30 | Yosuke Watanuki v Frederik Nielsen | 1-6,6-4,6-0 |
| Challenger Busan Qual | 2018/05/13 04:10 | Frederik Nielsen v Wishaya Trongcharoenchaikul | 6-7,6-4,6-0 |
| Challenger Seoul Qual | 2018/04/28 04:30 | Yong-Kyu Lim v Frederik Nielsen | 6-4,6-1 |
| Davis Cup | 2018/04/07 10:00 | Frederik Nielsen v Karim-Mohamed Maamoun | 6-3,3-6,6-7 |