| Challenger Eckental | 11/01 17:55 | 26 | [176] Oscar Otte v Ruben Bemelmans [129] | 4-6,1-6 | |
| Challenger Eckental | 10/30 18:45 | 25 | [173] Daniel Brands v Ruben Bemelmans [129] | 6-4,4-6,3-6 | |
| ATP Vienna | 10/23 16:05 | 25 | [7] Dominic Thiem v Ruben Bemelmans [134] | 7-5,7-6 | |
| ATP Vienna | 10/21 13:05 | 164 | [65] Guido Pella v Ruben Bemelmans [110] | 4-6,0-6 | |
| ATP Vienna | 10/20 13:55 | 64 | [183] Sebastian Ofner v Ruben Bemelmans [110] | 6-3,3-6,4-6 | |
| ATP Anversa | 10/16 19:05 | 25 | [38] Gael Monfils v Ruben Bemelmans [110] | 6-0,6-3 | |
| ATP Tokyo | 09/29 04:00 | 64 | [114] Ruben Bemelmans v Bradley Klahn [95] | 6-2,3-6,6-7 | |
| ATP Chengdu | 09/27 07:15 | 26 | [13] Fabio Fognini v Ruben Bemelmans [114] | 6-4,7-6 | |
| ATP Chengdu | 09/25 05:00 | 25 | [69] Mischa Zverev v Ruben Bemelmans [114] | Retired | |
| ATP Chengdu | 09/23 07:30 | 164 | [109] Ruben Bemelmans v Felix Auger Aliassime [144] | 7-6,6-2 | |
| ATP Chengdu | 09/22 06:30 | 64 | [109] Ruben Bemelmans v Rigele Te [424] | 6-3,6-3 | |
| ATP San Pietroburgo | 09/18 15:30 | 25 | [109] Ruben Bemelmans v Lukas Lacko [77] | 2-6,6-4,5-7 | |
| ATP San Pietroburgo | 09/17 10:00 | 164 | [109] Ruben Bemelmans v Adrian Menendez-Maceiras [126] | 6-4,2-6,3-6 | |
| ATP San Pietroburgo | 09/16 11:45 | 64 | [109] Ruben Bemelmans v Egor Gerasimov [263] | 6-2,4-6,7-6 | |
| Challenger Chicago | 09/07 18:55 | 27 | [128] Ruben Bemelmans v Denis Istomin [76] | 3-6,4-6 | |
| Challenger Chicago | 09/06 19:15 | 26 | [128] Ruben Bemelmans v Kaichi Uchida [299] | 6-3,6-4 | |
| Challenger Chicago | 09/05 18:05 | 25 | [128] Ruben Bemelmans v Hugo Nys [80] | 7-5,7-6 | |
| Challenger Chicago | 09/05 15:00 | 25 | Ruben Bemelmans v Darian King | Cancelled | |
| US Open | 08/28 18:00 | 23 | [128] Ruben Bemelmans v Jaume Munar [85] | 7-5,3-6,6-7,6-2,1-6 | |
| US Open | 08/24 17:00 | 46 | [150] Facundo Bagnis v Ruben Bemelmans [129] | 6-3,6-7,6-2 | |
| US Open | 08/23 15:00 | 45 | [172] Constant Lestienne v Ruben Bemelmans [129] | 4-6,3-6 | |
| US Open | 08/21 16:35 | 44 | [178] Kevin King v Ruben Bemelmans [129] | 4-6,3-6 | |
| Challenger Vancouver | 08/16 20:50 | 26 | [145] Lloyd Harris v Ruben Bemelmans [130] | 6-1,6-3 | |
| Challenger Vancouver | 08/14 22:30 | 25 | [120] Felix Auger Aliassime v Ruben Bemelmans [130] | 4-6,2-6 | |
| ATP Newport | 07/16 15:00 | 25 | [86] Denis Kudla v Ruben Bemelmans [113] | 6-3,6-4 | |
| Wimbledon | 07/05 12:45 | 24 | [10] John Isner v Ruben Bemelmans [104] | 6-1,6-4,6-7,6-7,7-5 | |
| Wimbledon | 07/02 15:35 | 23 | [42] Steve Johnson v Ruben Bemelmans [104] | 5-7,3-6,6-4,7-6,6-8 | |
| Wimbledon - Qual. | 06/28 10:00 | 45 | [104] Ruben Bemelmans v Bernard Tomic [162] | 6-3,6-1,6-2 | |
| Wimbledon - Qual. | 06/26 14:25 | 45 | [104] Ruben Bemelmans v Enrique Lopez-Perez [158] | 6-4,6-2 | |
| Wimbledon - Qual. | 06/25 12:25 | 44 | [103] Ruben Bemelmans v Christopher Eubanks [183] | 6-4,6-4 |