Stadium: Arena 2 Round: 64 Ground: Hardcourt outdoor
| St. Petersburg, Russia | 2018/09/23 13:30 | Dominic Thiem v Martin Klizan | 6-3,6-1 |
| St. Petersburg, Russia | 2018/09/22 11:00 | Stan Wawrinka v Martin Klizan | 6-4,3-6,5-7 |
| St. Petersburg, Russia | 2018/09/21 10:00 | Denis Shapovalov v Martin Klizan | 6-3,5-7,3-6 |
| St. Petersburg, Russia | 2018/09/19 17:50 | Martin Klizan v Fabio Fognini | 6-3,6-4 |
| St. Petersburg, Russia | 2018/09/17 12:00 | Evgeny Donskoy v Martin Klizan | 4-6,4-6 |
| Genoa, Italy | 2018/09/04 19:15 | Baldi, Filippo v Martin Klizan | 0-6,2-6 |
| Challenger Como | 2018/09/01 14:30 | Martin Klizan v Galovic, Viktor | 6-7,0-6 |
| Challenger Como | 2018/08/27 15:30 | Martin Klizan v Alessandro Giannessi | 6-2,6-4 |
| Chengdu, Chine | 2018/09/26 05:00 | Gunneswaran, Prajnesh v Matteo Berrettini | 3-6,4-6 |
| Chengdu, Chine | 2018/09/23 07:30 | Hiroki Moriya v Gunneswaran, Prajnesh | 4-6,3-6 |
| Chengdu, Chine | 2018/09/22 05:00 | Xia, Zihao v Gunneswaran, Prajnesh | 2-6,5-7 |
| Challenger Kaohsiung | 2018/09/19 05:35 | Gunneswaran, Prajnesh v Jurij Rodionov | 3-6,7-5,3-6 |
| Coupe Davis | 2018/09/14 15:30 | Dusan Lajovic v Gunneswaran, Prajnesh | 6-4,6-3,6-4 |
| Challenger Aptos | 2018/08/11 01:00 | Thanasi Kokkinakis v Gunneswaran, Prajnesh | 4-6,6-4,6-3 |
| Challenger Aptos | 2018/08/08 22:55 | Aragone, JC v Gunneswaran, Prajnesh | 6-4,5-7,4-6 |
| Challenger Aptos | 2018/08/06 21:25 | Brandon Holt v Gunneswaran, Prajnesh | 6-4,4-6,2-6 |