| ATP - Montpellier | 02/08 12:00 | 26 | Damir Dzumhur v Bemelmans, Ruben | 7-5,6-4 | |
| ATP - Montpellier | 02/07 13:25 | 25 | Calvin Hemery v Bemelmans, Ruben | 1-6,2-6 | |
| Coupe Davis | 02/04 15:20 | 26 | Bemelmans, Ruben v Balazs, Attila | Cancelled | |
| Coupe Davis | 02/02 12:30 | 26 | Bemelmans, Ruben v Marton Fucsovics | 6-4,4-6,7-6,6-3 | |
| Open d'Australie | 01/17 00:00 | 24 | Nikoloz Basilashvili v Bemelmans, Ruben | 7-5,6-1,6-3 | |
| Open d'Australie | 01/15 07:40 | 23 | Bemelmans, Ruben v Lucas Pouille | 6-4,6-4,6-7,7-6 | |
| Australian Open Qual | 01/14 00:45 | 46 | Bemelmans, Ruben v Duckhee Lee | 6-4,6-4 | |
| Australian Open Qual | 01/12 00:30 | 45 | Bemelmans, Ruben v Galovic, Viktor | 5-7,6-3,7-5 | |
| Australian Open Qual | 01/10 07:20 | 44 | Bemelmans, Ruben v Kamil Majchrzak | 7-5,5-7,7-5 | |
| ATP Pune | 01/02 13:55 | 25 | Thiago Monteiro v Bemelmans, Ruben | 6-7,6-3,7-6 | |
| Mouilleron-Le-Captif, France | 11/07 10:00 | 25 | [101] Bemelmans, Ruben v Galovic, Viktor [224] | 3-6,6-7 | |
| Challenger Eckental | 11/03 11:00 | 27 | [86] Bemelmans, Ruben v Janowicz, Jerzy [136] | 4-6,4-6 | |
| Challenger Eckental | 11/01 11:50 | 26 | [86] Bemelmans, Ruben v Vanni, Luca [152] | 6-3,6-7,6-1 | |
| Challenger Eckental | 10/31 13:05 | 25 | [86] Bemelmans, Ruben v Lloyd Harris [232] | 6-3,6-2 | |
| Basel, Switzerland | 10/25 13:00 | 25 | Bemelmans, Ruben v Adrian Mannarino | 6-7,6-4,1-6 | |
| Antwerp, Belgium | 10/21 12:00 | 28 | [98] Bemelmans, Ruben v Tsonga, Jo-Wilfried [17] | 3-6,3-6 | |
| Antwerp, Belgium | 10/20 12:00 | 27 | [61] Joao Sousa v Bemelmans, Ruben [98] | 6-4,6-7,4-6 | |
| Antwerp, Belgium | 10/18 19:15 | 26 | [98] Bemelmans, Ruben v Kyrgios, Nick [20] | 6-7,6-3,6-3 | |
| Antwerp, Belgium | 10/16 15:25 | 25 | [98] Bemelmans, Ruben v Gojowczyk, Peter [68] | 4-6,7-6,7-6 | |
| Challenger Stockton | 10/03 17:00 | 25 | [101] Bemelmans, Ruben v Elias Ymer [208] | 5-7,3-6 | |
| Challenger Tiburon | 09/26 18:50 | 25 | Bemelmans, Ruben v Fawcett, Tom | 6-3,3-6,3-6 | |
| US Open, New York, USA | 08/28 21:00 | 23 | [20] Lucas Pouille v Bemelmans, Ruben [96] | 6-3,6-4,6-4 | |
| ATP Winston-Salem Qual | 08/19 17:55 | 26 | Bemelmans, Ruben v Gojo, Borna | 6-7,6-3,6-7 | |
| Vancouver, Canada | 08/17 00:55 | 26 | [100] Bemelmans, Ruben v Stefano Napolitano [203] | 5-7,6-3,4-6 | |
| Vancouver, Canada | 08/16 01:30 | 25 | [100] Bemelmans, Ruben v Bester, Philip [280] | 7-6,6-4 | |
| Challenger Aptos | 08/07 19:40 | 25 | [97] Bemelmans, Ruben v Liam Broady [336] | 6-3,4-6,2-6 | |
| Washington, USA | 08/01 20:20 | 24 | [75] Jordan Thompson v Bemelmans, Ruben [98] | 6-3,6-2 | |
| Challenger Scheveningen | 07/23 13:00 | 29 | [163] Garcia-Lopez, Guillermo v Bemelmans, Ruben [96] | 6-1,6-7,6-2 | |
| Challenger Scheveningen | 07/22 11:00 | 28 | [96] Bemelmans, Ruben v Tepavac, Marko [410] | 6-2,6-1 | |
| Challenger Scheveningen | 07/21 12:35 | 27 | [96] Bemelmans, Ruben v Bolelli, Simone [230] | 6-2,6-4 |