Stadium: Arena 2 Round: 164 Ground: Hardcourt outdoor
| ATP Tokyo | 2018/09/29 06:20 | Martin Klizan v Prajnesh Gunneswaran | 6-4,6-2 |
| ATP St Petersburg | 2018/09/23 13:30 | Dominic Thiem v Martin Klizan | 6-3,6-1 |
| ATP St Petersburg | 2018/09/22 11:00 | Stan Wawrinka v Martin Klizan | 6-4,3-6,5-7 |
| ATP St Petersburg | 2018/09/21 10:00 | Denis Shapovalov v Martin Klizan | 6-3,5-7,3-6 |
| ATP St Petersburg | 2018/09/19 17:50 | Martin Klizan v Fabio Fognini | 6-3,6-4 |
| ATP St Petersburg | 2018/09/17 12:00 | Evgeny Donskoy v Martin Klizan | 4-6,4-6 |
| Challenger Genova | 2018/09/04 19:15 | Filippo Baldi v Martin Klizan | 0-6,2-6 |
| Challenger Como | 2018/09/01 14:30 | Martin Klizan v Viktor Galovic | 6-7,0-6 |
| ATP Tokyo | 2018/09/29 04:00 | Ruben Bemelmans v Bradley Klahn | 6-2,3-6,6-7 |
| ATP Chengdu | 2018/09/24 09:50 | Bradley Klahn v Bernard Tomic | 7-6,6-7,2-6 |
| US Open | 2018/08/27 16:50 | John Isner v Bradley Klahn | 7-6,6-3,6-4 |
| ATP Cincinnati | 2018/08/15 18:15 | Bradley Klahn v Pablo Carreno Busta | 4-6,4-6 |
| ATP Cincinnati | 2018/08/13 18:55 | Maximilian Marterer v Bradley Klahn | 6-7,4-6 |
| ATP Cincinnati Qual | 2018/08/12 14:00 | Bradley Klahn v Guillermo Garcia-Lopez | 7-6,7-6 |
| ATP Cincinnati Qual | 2018/08/11 14:30 | Tennys Sandgren v Bradley Klahn | 4-6,6-7 |
| ATP Toronto | 2018/08/08 23:35 | Bradley Klahn v Alexander Zverev | 4-6,4-6 |