Stadium: Estadio Round: 27
| Challenger Guadalajara | 2018/04/19 01:00 | Krstin, Pedja v Manuel Sanchez | 6-3,6-1 |
| Challenger Guadalajara | 2018/04/16 18:00 | Novikov, Dennis v Krstin, Pedja | 6-7,3-6 |
| Challenger - Mexique | 2018/04/11 19:00 | Quiroz, Roberto v Krstin, Pedja | 4-6,6-1,6-4 |
| Challenger - Mexique | 2018/04/09 23:00 | Petrovic, Danilo v Krstin, Pedja | 3-6,6-1,4-6 |
| Challenger Panama City | 2018/04/03 21:50 | Krstin, Pedja v Jay Clarke | 5-7,2-6 |
| Challenger - San Luis Potosí | 2018/03/29 18:00 | Pedro Sakamoto v Krstin, Pedja | 4-6,6-3,7-5 |
| Challenger - San Luis Potosí | 2018/03/27 18:00 | Lopez Villasenor, Gerardo v Krstin, Pedja | 2-6,3-6 |
| Miami, USA, Qualifying | 2018/03/19 17:25 | Fratangelo, Bjorn v Krstin, Pedja | 4-6,6-3,6-0 |
| Challenger Guadalajara | 2018/04/18 21:00 | Pavic, Ante v Darian King | 3-6,6-2,4-6 |
| Challenger Guadalajara | 2018/04/17 17:00 | Quiroz, Roberto v Darian King | 6-3,3-6,3-6 |
| ATP Houston Qual | 2018/04/07 21:15 | Mitchell Krueger v Darian King | 7-5,6-3 |
| Challenger Panama City | 2018/04/03 16:00 | Pavic, Ante v Darian King | 6-1,6-4 |
| Challenger Le Gosier | 2018/03/29 18:00 | Dusan Lajovic v Darian King | 6-3,6-4 |
| Challenger Le Gosier | 2018/03/28 20:45 | Darian King v Jomby, Tom | 6-7,6-1,6-2 |
| ATP - Miami | 2018/03/22 15:00 | Nicola Kuhn v Darian King | 7-6,6-4 |
| Miami, USA, Qualifying | 2018/03/20 14:00 | Darian King v Mackenzie McDonald | 2-6,6-4,6-4 |