Stadium: COURT 5 Round: 24 Ground: Hardcourt outdoor
| Challenger Las Vegas | 2018/10/21 19:20 | Alex Rybakov v Roberto Ortega-Olmedo | 6-7,4-6 |
| Challenger Las Vegas | 2018/10/20 20:45 | Alex Rybakov v Alejandro Gonzalez | 6-2,7-6 |
| Challenger Fairfield | 2018/10/09 17:00 | Alex Rybakov v Maxime Janvier | 6-7,3-6 |
| Challenger Cary | 2018/09/09 16:15 | Alex Rybakov v Joris De Loore | 1-6,2-6 |
| Challenger Cary | 2018/09/08 14:00 | Blaine Boyden v Alex Rybakov | 1-6,3-6 |
| Challenger Aptos | 2018/08/04 17:20 | Ruan Roelofse v Alex Rybakov | 3-6,6-7 |
| Challenger Lexington | 2018/07/31 20:55 | Alex Rybakov v Stefano Napolitano | 4-6,3-6 |
| Challenger Lexington Qual | 2018/07/30 16:00 | Alex Rybakov v Ruan Roelofse | 7-5,7-6 |
| ITF Qatar F6 | 2018/12/18 08:55 | Goncalo Oliveira v Constantin Schmitz | 4-6,3-6 |
| ITF Qatar F5 | 2018/12/15 13:00 | Tak Khunn Wang v Goncalo Oliveira | 6-3,6-3 |
| ITF Qatar F5 | 2018/12/14 12:00 | Jaume Pla Malfeito v Goncalo Oliveira | 4-6,4-6 |
| ITF Qatar F5 | 2018/12/13 12:00 | Antoine Bellier v Goncalo Oliveira | 4-6,2-6 |
| ITF Qatar F5 | 2018/12/12 12:00 | Mick Lescure v Goncalo Oliveira | 4-6,3-6 |
| ITF Qatar F5 | 2018/12/11 13:40 | Constantin Bittoun Kouzmine v Goncalo Oliveira | 3-6,6-7 |
| ITF Qatar F4 | 2018/12/08 13:00 | Aslan Karatsev v Goncalo Oliveira | 3-6,5-7 |
| ITF Qatar F4 | 2018/12/07 12:00 | Michail Pervolarakis v Goncalo Oliveira | 6-7,4-6 |