Stadium: Center Round: 26 Ground: Grass
| Challenger Ostrava | 2018/05/01 14:00 | Arthur De Greef v Sergiy Stakhovsky | 6-4,3-6,6-3 |
| ATP Budapest Qual | 2018/04/21 10:25 | Elias Ymer v Sergiy Stakhovsky | 6-3,6-3 |
| ATP Monte Carlo Qual | 2018/04/15 11:45 | Sergiy Stakhovsky v Dusan Lajovic | 4-6,4-6 |
| ATP Monte Carlo Qual | 2018/04/14 12:35 | Viktor Troicki v Sergiy Stakhovsky | 1-6,3-6 |
| Challenger St Brieuc | 2018/03/28 14:00 | Sergiy Stakhovsky v Tobias Kamke | 4-6,3-6 |
| ATP Miami Qual | 2018/03/20 20:55 | Ricardas Berankis v Sergiy Stakhovsky | 3-6,6-3,6-0 |
| ATP Miami Qual | 2018/03/19 18:55 | Evan King v Sergiy Stakhovsky | 3-6,6-4,6-7 |
| Challenger Irving | 2018/03/14 21:20 | Sergiy Stakhovsky v Steve Johnson | 7-5,6-7,4-6 |
| ATP Madrid Qual | 2018/05/05 09:00 | Pierre-Hugues Herbert v Ramkumar Ramanathan | 6-4,6-3 |
| ATP Istanbul Qual | 2018/04/29 10:20 | Ramkumar Ramanathan v Marco Trungelliti | 4-6,3-6 |
| ATP Istanbul Qual | 2018/04/28 11:25 | Ramkumar Ramanathan v Aldin Setkic | 6-4,6-3 |
| Challenger Anning | 2018/04/23 05:45 | Ramkumar Ramanathan v Andrew Whittington | 4-6,6-7 |
| Challenger Nanchang | 2018/04/20 04:30 | Ramkumar Ramanathan v Aleksandr Nedovyesov | 2-6,5-7 |
| Challenger Nanchang | 2018/04/19 03:00 | Ramkumar Ramanathan v Vaclav Safranek | 7-5,6-1 |
| Challenger Nanchang | 2018/04/18 05:45 | Ramkumar Ramanathan v Yibing Wu | 4-6,6-2,6-3 |
| Challenger Taipei | 2018/04/15 07:55 | Yuki Bhambri v Ramkumar Ramanathan | 6-3,6-4 |