Stadium: Chantereyne Round: 25 Ground: Hardcourt indoor
| Wimbledon Qual | 2017/06/26 11:30 | Ruben Bemelmans v Tristan Lamasine | 3-6,6-1,6-3 |
| Challenger - Quimper | 2020/01/28 19:50 | Vit Kopriva v Tristan Lamasine | 6-4,7-6 |
| Challenger - Rennes | 2020/01/23 09:00 | Tristan Lamasine v Kyrian Jacquet | 6-2,1-6,2-6 |
| Challenger - Rennes | 2020/01/21 13:35 | Tristan Lamasine v Vit Kopriva | 6-3,3-6,6-0 |
| Australian Open | 2020/01/14 00:00 | Lukas Rosol v Tristan Lamasine | 6-4,6-3 |
| Challenger - Noumea | 2020/01/10 04:05 | Tristan Lamasine v Cedrik-Marcel Stebe | 4-6,1-6 |
| Challenger - Noumea | 2020/01/09 07:50 | Tristan Lamasine v Ernests Gulbis | 6-2,6-2 |
| Challenger - Noumea | 2020/01/07 06:30 | Federico Delbonis v Tristan Lamasine | 3-6,4-6 |
| Challenger - Noumea | 2020/01/06 06:55 | Tristan Lamasine v Bernabe Zapata Miralles | 4-6,6-4,7-5 |
| Challenger - Cherbourg | 2020/02/10 13:15 | Ruben Bemelmans v Andrea Pellegrino | 6-3,6-1 |
| Challenger - Quimper | 2020/01/28 17:30 | Ruben Bemelmans v Manuel Guinard | 6-7,6-7 |
| ITF M25 - Nussloch | 2020/01/26 13:00 | Jonas Forejtek v Ruben Bemelmans | 7-6,6-7,2-6 |
| ITF M25 - Nussloch | 2020/01/25 17:05 | Julian Ocleppo v Ruben Bemelmans | 6-7,6-3,6-7 |
| ITF M25 - Nussloch | 2020/01/24 19:00 | Johannes Haerteis v Ruben Bemelmans | 4-6,3-6 |
| ITF M25 - Nussloch | 2020/01/23 17:00 | Adrian Bodmer v Ruben Bemelmans | 5-7,4-6 |
| ITF M25 - Nussloch | 2020/01/21 15:20 | Kacper Zuk v Ruben Bemelmans | 3-6,3-6 |
| Challenger - Ann Arbor | 2020/01/08 20:20 | Ruben Bemelmans v Aleksandar Kovacevic | 2-6,4-6 |