| Challenger Ostrava | 04/23 08:50 | 25 | [285] Tristan Lamasine v Jelle Sels [445] | 3-6,6-4,5-7 | |
| Challenger Oeiras | 04/15 09:30 | 19 | [250] Chun Hsin Tseng v Tristan Lamasine [284] | 6-3,6-2 | |
| Challenger Oeiras | 04/14 09:30 | 14 | [369] Arthur Weber v Tristan Lamasine [290] | 5-7,6-7 | |
| Challenger Spalato | 04/11 09:00 | 26 | [368] Elmer Moller v Tristan Lamasine [290] | 6-1,6-3 | |
| Challenger Spalato | 04/09 11:45 | 25 | [281] Jiri Vesely v Tristan Lamasine [290] | 3-6,4-6 | |
| Challenger Barcellona | 04/02 10:20 | 25 | [187] Vitaliy Sachko v Tristan Lamasine [286] | 6-7,6-1,7-5 | |
| Challenger Napoli | 03/24 09:00 | 14 | Evan Furness v Tristan Lamasine | 7-5,6-1 | |
| Challenger Lilla | 02/29 13:55 | 26 | [285] Tristan Lamasine v Pierre-Hugues Herbert [166] | 1-6,5-7 | |
| Challenger Lilla | 02/27 16:00 | 25 | [201] Antoine Escoffier v Tristan Lamasine [285] | 6-7,5-7 | |
| Challenger Lilla | 02/26 09:30 | 19 | [247] Lucas Poullain v Tristan Lamasine [280] | 6-4,4-6,4-6 | |
| Challenger Lilla | 02/25 09:00 | 14 | [414] Filip Krajinovic v Tristan Lamasine [280] | 2-6,7-6,1-6 | |
| Challenger Pau | 02/20 11:35 | 25 | [280] Tristan Lamasine v Otto Virtanen [172] | 5-7,6-7 | |
| Challenger Pau | 02/19 10:00 | 19 | [280] Tristan Lamasine v Arthur Bouquier [398] | 6-2,6-4 | |
| Challenger Pau | 02/18 09:00 | 14 | Tristan Lamasine v Florent Bax | 6-4,6-1 | |
| Challenger Cherbourg | 02/15 12:50 | 26 | [262] Alibek Kachmazov v Tristan Lamasine [280] | 6-3,6-4 | |
| Challenger Cherbourg | 02/13 19:05 | 25 | [280] Tristan Lamasine v Jan Choinski [157] | 6-4,3-6,7-6 | |
| Challenger Cherbourg | 02/12 13:10 | 19 | [280] Tristan Lamasine v Daniil Glinka [493] | 4-6,6-3,6-4 | |
| Challenger Cherbourg | 02/11 18:50 | 14 | [289] Tristan Lamasine v Neil Oberleitner [170] | 6-1,7-6 | |
| Challenger Nottingham | 02/07 11:55 | 26 | [289] Tristan Lamasine v Abdullah Shelbayh [188] | 4-6,6-4,4-6 | |
| Challenger Nottingham | 02/05 13:50 | 25 | [289] Tristan Lamasine v Adrian Andreev [269] | 7-5,7-5 | |
| Challenger Koblenz | 02/01 14:05 | 26 | [180] Zdenek Kolar v Tristan Lamasine [295] | 6-3,7-6 | |
| Challenger Koblenz | 01/31 11:00 | 25 | Tom Gentzsch v Tristan Lamasine | 0-6,2-6 | |
| Challenger Koblenz | 01/29 09:00 | 19 | [302] Tristan Lamasine v Guy Den Ouden [351] | 6-1,6-4 | |
| Challenger Koblenz | 01/28 10:30 | 14 | [302] Tristan Lamasine v Aidan Mchugh [346] | 6-3,6-7,6-3 | |
| Challenger Quimper | 01/25 14:20 | 26 | [252] Pierre-Hugues Herbert v Tristan Lamasine [302] | 7-6,7-5 | |
| Challenger Quimper | 01/24 14:05 | 25 | [302] Tristan Lamasine v Moez Echargui [283] | 6-4,6-7,6-3 | |
| Challenger Quimper | 01/23 12:20 | 19 | [272] Mathias Bourgue v Tristan Lamasine [302] | 2-6,6-1,6-2 | |
| Challenger Quimper | 01/22 12:45 | 14 | Niels Villard v Tristan Lamasine | 4-6,2-6 | |
| Challenger Oeiras | 01/08 13:40 | 19 | [299] Tristan Lamasine v Sebastian Fanselow [324] | 4-6,4-6 | |
| Challenger Oeiras - Qual. | 01/07 18:05 | 14 | Tristan Lamasine v Martim Simoes | 6-3,6-2 |
Tristan Lamasine (Thiais, 5 marzo 1993) è un tennista francese. Ha ottenuto i migliori risultati in doppio, con diversi titoli nel circuito Challenger e l'85º posto del ranking ATP raggiunto nel giugno 2016. In singolare ha vinto un solo titolo Challenger ed è stato 181º della graduatoria mondiale nell'agosto 2015.