| Challenger Guangzhou | 04/28 09:25 | 14 | [323] Rio Noguchi v Mikalai Haliak [364] | 4-6,6-4,7-6 | |
| Challenger Shenzhen | 04/22 04:05 | 14 | [444] Akira Santillan v Mikalai Haliak [364] | 4-6,6-2,7-6 | |
| Challenger Gwangju | 04/14 01:30 | 14 | [454] Yusuke Takahashi v Mikalai Haliak [373] | 6-1,6-1 | |
| Challenger Busan | 04/08 01:00 | 19 | [337] Yanki Erel v Mikalai Haliak [378] | Retired | |
| Challenger Busan | 04/07 03:50 | 14 | Jiho Lee v Mikalai Haliak | 3-6,0-6 | |
| ITF M25 Trnava | 03/29 10:40 | 27 | [471] Max Hans Rehberg v Mikalai Haliak [372] | 7-6,7-6 | |
| ITF M25 Trnava | 03/28 10:25 | 26 | Patrik Homola v Mikalai Haliak | 4-6,4-6 | |
| ITF M25 Trnava | 03/26 13:30 | 25 | [327] Mark Whitehouse v Mikalai Haliak [372] | 2-6,1-6 | |
| Challenger Hamburg | 03/10 09:00 | 14 | [247] Jakub Paul v Mikalai Haliak [375] | 7-5,6-4 | |
| Challenger Lugano | 03/03 19:50 | 14 | [243] Yuta Shimizu v Mikalai Haliak [371] | 6-4,6-4 | |
| Challenger Pau | 02/18 11:45 | 14 | [247] Lucas Poullain v Mikalai Haliak [373] | 6-1,6-3 | |
| Challenger Manama | 02/12 15:55 | 19 | [265] Adrian Andreev v Mikalai Haliak [373] | 6-1,6-2 | |
| Challenger Manama | 02/12 11:15 | 14 | Anthony Popyrin v Mikalai Haliak | 4-6,7-5,4-6 | |
| Challenger Burnie | 02/05 02:35 | 25 | [384] Mikalai Haliak v Yusuke Takahashi [418] | 1-6,7-6,3-6 | |
| Challenger Burnie | 01/31 01:55 | 26 | [384] Mikalai Haliak v Marc Polmans [161] | 3-6,6-4,6-7 | |
| Challenger Burnie | 01/29 04:10 | 25 | [371] Christian Langmo v Mikalai Haliak [380] | 6-3,5-7,6-7 | |
| Challenger Quimper | 01/22 13:55 | 14 | [98] Arjun Kadhe v Mikalai Haliak [380] | 7-5,6-4 | |
| Challenger Tenerife | 01/14 10:00 | 14 | [379] Mikalai Haliak v Nino Serdarusic [318] | 3-6,2-6 | |
| ATP Adelaide | 01/07 04:25 | 14 | [385] Mikalai Haliak v James McCabe [272] | 1-6,4-6 | |
| Challenger Noumea | 01/01 01:00 | 19 | Mikalai Haliak v Jesse Delaney | Retired | |
| ITF M15 Yanagawa | 12/28 01:00 | 26 | Mikalai Haliak v Keisuke Saitoh | 4-6,3-6 | |
| ITF M15 Yanagawa | 12/27 00:30 | 25 | Mikalai Haliak v Ryotaro Matsumura | 6-3,6-3 | |
| ATP Metz | 11/04 16:00 | 14 | [171] Gijs Brouwer v Mikalai Haliak [366] | 6-3,6-2 | |
| Challenger Shenzhen | 10/17 02:00 | 26 | [368] Mikalai Haliak v Terence Atmane [132] | 1-6,4-6 | |
| Challenger Shenzhen | 10/10 03:00 | 19 | [379] Mikalai Haliak v Yan Bai [448] | 6-4,5-7,1-6 | |
| Challenger Shenzhen | 10/09 08:00 | 14 | Mikalai Haliak v Yaojie Zeng | 6-3,7-6 | |
| ATP Shanghai | 10/02 05:40 | 14 | [138] James Duckworth v Mikalai Haliak [380] | 6-4,6-3 | |
| ATP Chengdu | 09/19 03:00 | 14 | [380] Mikalai Haliak v Omar Jasika [303] | 7-5,3-6,2-6 | |
| Challenger Guangzhou | 09/12 07:20 | 25 | [389] Mikalai Haliak v Juncheng Shang [155] | 7-6,1-6,2-6 | |
| Challenger Guangzhou | 09/11 02:00 | 19 | Mikalai Haliak v Yaojie Zeng | 3-6,6-0,7-5 |