Stadium: Center Court 1 Round: 54
| Challenger Lexington Qual | 2018/07/29 16:30 | Alex Rybakov v Strong Kirchheimer | 4-6,7-5,6-3 |
| Challenger Lexington Qual | 2018/07/28 16:40 | Alex Rybakov v Julian Bradley | 6-1,6-3 |
| Challenger Binghamton | 2018/07/26 13:00 | Edan Leshem v Alex Rybakov | 6-4,6-3 |
| ATP Newport Qual | 2018/07/16 15:00 | Alex Rybakov v Alex Bolt | 3-6,6-3,3-6 |
| ATP Newport Qual | 2018/07/15 15:00 | Mohamed Safwat v Alex Rybakov | 3-6,3-6 |
| Challenger Winnetka Qual | 2018/07/09 15:00 | Mohamed Aziz Dougaz v Alex Rybakov | 7-6,6-4 |
| Challenger Winnetka Qual | 2018/07/08 16:50 | Osgar O'Hoisin v Alex Rybakov | 3-6,3-6 |
| Challenger Winnetka Qual | 2018/07/07 20:55 | Aleksandar Kovacevic v Alex Rybakov | 1-6,7-6,2-6 |
| Challenger Lexington Qual | 2018/07/29 16:45 | Austin Hussey v Ruan Roelofse | 1-6,1-6 |
| Challenger Lexington Qual | 2018/07/28 18:55 | Ruan Roelofse v Kento Takeuchi | 6-4,6-4 |
| Challenger Binghamton Qual | 2018/07/21 17:20 | Ruan Roelofse v Jared Hiltzik | 5-7,4-6 |
| Challenger Puerto Vallarta Qual | 2018/04/28 19:25 | Jose Olivares v Ruan Roelofse | 6-3,7-5 |
| Challenger Taipei | 2018/04/10 06:50 | Ti Chen v Ruan Roelofse | 7-6,6-3 |
| Challenger Taipei Qual | 2018/04/09 03:00 | Ruan Roelofse v Jacob Grills | 6-4,2-6,7-6 |
| Challenger Taipei Qual | 2018/04/07 02:00 | Chen Chang v Ruan Roelofse | 0-6,3-6 |
| ITF USA F8 | 2018/03/23 17:30 | Mathias Bourgue v Ruan Roelofse | 6-3,6-4 |