| ATP - Sofia | 02/08 16:00 | 27 | [38] Martin Klizan v Daniil Medvedev [16] | 4-6,1-6 | |
| ATP - Sofia | 02/07 10:00 | 26 | [180] Daniel Brands v Martin Klizan [38] | 6-7,4-6 | |
| ATP - Sofia | 02/06 10:00 | 25 | [99] Mirza Basic v Martin Klizan [38] | 0-6,6-3,2-6 | |
| Cupa Davis | 02/02 12:05 | - | [38] Martin Klizan v Denis Shapovalov [25] | 6-7,4-6 | |
| Cupa Davis | 02/01 15:45 | - | [38] Martin Klizan v Felix Auger Aliassime [106] | 7-5,6-3 | |
| Australian Open | 01/15 05:45 | 23 | [177] Jo-Wilfried Tsonga v Martin Klizan [40] | 6-4,6-4,7-6 | |
| ATP - Sydney | 01/09 04:00 | 26 | [40] Martin Klizan v Andreas Seppi [37] | 6-7,2-6 | |
| ATP - Sydney | 01/06 01:00 | 25 | [41] Martin Klizan v Alexei Popyrin [147] | 7-6,4-6,7-6 | |
| Cupa Davis | 10/27 13:25 | 28 | [46] Martin Klizan v Egor Gerasimov [179] | 6-4,6-3 | |
| Cupa Davis | 10/26 14:00 | 28 | Martin Klizan v Alexander Zgirovsky | 6-1,6-4 | |
| ATP - Moscova | 10/16 13:40 | 25 | [46] Andreas Seppi v Martin Klizan [47] | 6-1,7-6 | |
| ATP - Shanghai | 10/07 06:55 | 46 | [51] Martin Klizan v Taylor Fritz [60] | 6-3,3-6,4-6 | |
| ATP - Shanghai | 10/06 06:10 | 45 | [51] Martin Klizan v Rigele Te [419] | 6-3,6-4 | |
| ATP - Tokyo | 10/03 08:05 | 26 | [32] Daniil Medvedev v Martin Klizan [51] | 6-4,6-3 | |
| ATP - Tokyo | 10/01 07:05 | 25 | [49] Martin Klizan v Steve Johnson [30] | 6-4,7-6 | |
| ATP - Tokyo | 09/30 03:00 | 164 | [49] Martin Klizan v Bradley Klahn [95] | 6-3,6-4 | |
| ATP - Tokyo | 09/29 06:20 | 64 | [49] Martin Klizan v Prajnesh Gunneswaran [164] | 6-4,6-2 | |
| ATP - St Petersburg | 09/23 13:30 | 29 | [8] Dominic Thiem v Martin Klizan [65] | 6-3,6-1 | |
| ATP - St Petersburg | 09/22 11:00 | 28 | [88] Stan Wawrinka v Martin Klizan [65] | 6-4,3-6,5-7 | |
| ATP - St Petersburg | 09/21 10:00 | 27 | [34] Denis Shapovalov v Martin Klizan [65] | 6-3,5-7,3-6 | |
| ATP - St Petersburg | 09/19 17:50 | 26 | [65] Martin Klizan v Fabio Fognini [13] | 6-3,6-4 | |
| ATP - St Petersburg | 09/17 12:00 | 25 | [84] Evgeny Donskoy v Martin Klizan [65] | 4-6,4-6 | |
| Challenger - Genova | 09/06 09:00 | 26 | [311] Thomaz Bellucci v Martin Klizan [71] | Retired | |
| Challenger - Genova | 09/04 19:15 | 25 | [286] Filippo Baldi v Martin Klizan [71] | 0-6,2-6 | |
| Challenger - Como | 09/01 14:30 | 27 | [71] Martin Klizan v Viktor Galovic [223] | 6-7,0-6 | |
| Challenger - Como | 08/29 10:30 | 26 | [71] Martin Klizan v Andrej Martin [157] | Retired | |
| Challenger - Como | 08/27 15:30 | 25 | [71] Martin Klizan v Alessandro Giannessi [228] | 6-2,6-4 | |
| Challenger Pullach | 08/11 14:05 | 28 | [56] Jan-Lennard Struff v Martin Klizan [77] | 6-4,6-4 | |
| Challenger Pullach | 08/10 13:15 | 27 | [336] Mikael Ymer v Martin Klizan [77] | 3-6,2-6 | |
| Challenger Pullach | 08/08 16:50 | 26 | [191] Kamil Majchrzak v Martin Klizan [77] | 3-6,3-6 |