Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| Challenger Almaty Qual | 2018/06/10 04:30 | Laurynas Grigelis v Daniel Masur | 6-3,3-6,5-7 |
| Challenger Almaty Qual | 2018/06/09 05:50 | Laurynas Grigelis v Ivan Gakhov | 1-6,7-5,6-2 |
| Challenger Shymkent | 2018/06/06 05:00 | Jurij Rodionov v Laurynas Grigelis | 6-4,3-6,7-6 |
| Challenger Shymkent | 2018/06/05 06:10 | Laurynas Grigelis v Enrique Lopez-Perez | 6-3,7-5 |
| Challenger Mestre | 2018/05/25 09:30 | Laurynas Grigelis v Gian Marco Moroni | 2-6,0-6 |
| Challenger Mestre | 2018/05/24 10:55 | Laurynas Grigelis v Luca Vanni | 6-2,2-6,6-2 |
| Challenger Mestre | 2018/05/23 08:30 | Tsung-Hua Yang v Laurynas Grigelis | 3-6,0-6 |
| Challenger Nanchang | 2018/04/16 03:00 | Tsung-Hua Yang v Laurynas Grigelis | 0-6,7-6,6-3 |
| French Open Qual | 2018/05/21 15:05 | Bernard Tomic v Darian King | 7-6,6-0 |
| Challenger Leon | 2018/04/25 16:00 | Ante Pavic v Darian King | 6-4,6-2 |
| Challenger Leon | 2018/04/23 20:00 | Manuel Sanchez v Darian King | 4-6,6-7 |
| Challenger Guadalajara | 2018/04/20 21:00 | Pedja Krstin v Darian King | 6-2,1-6,6-2 |
| Challenger Guadalajara | 2018/04/18 21:00 | Ante Pavic v Darian King | 3-6,6-2,4-6 |
| Challenger Guadalajara | 2018/04/17 17:00 | Roberto Quiroz 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 | Ante Pavic v Darian King | 6-1,6-4 |