| 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 - Kwalifikacje | 01/07 18:05 | 14 | Tristan Lamasine v Martim Simoes | 6-3,6-2 | |
| Challenger Oeiras | 01/05 15:20 | 27 | [276] Valentin Royer v Tristan Lamasine [309] | 6-4,6-3 | |
| Challenger Oeiras | 01/03 11:00 | 26 | [393] Jay Clarke v Tristan Lamasine [309] | 6-1,4-6,4-6 | |
| Challenger Oeiras | 01/01 17:05 | 25 | [309] Tristan Lamasine v Maxime Janvier [258] | Retired | |
| Challenger Hamburg | 10/21 10:00 | 28 | [176] Dennis Novak v Tristan Lamasine [331] | 4-6,6-3,6-4 | |
| Challenger Hamburg | 10/20 10:35 | 27 | [411] Akira Santillan v Tristan Lamasine [331] | 4-6,2-6 | |
| Challenger Hamburg | 10/19 09:00 | 26 | [331] Tristan Lamasine v Maximilian Neuchrist [260] | 7-5,6-4 | |
| Challenger Hamburg | 10/17 12:45 | 25 | [331] Tristan Lamasine v Manuel Guinard [282] | 6-0,6-0 | |
| Challenger Hamburg | 10/16 14:15 | 19 | [331] Tristan Lamasine v Jakob Schnaitter [245] | 6-2,6-1 | |
| Challenger Hamburg | 10/15 16:00 | 14 | Tristan Lamasine v John Sperle | 2-6,6-2,6-0 | |
| Challenger Mouilleron le Captif | 10/02 08:30 | 19 | Tristan Lamasine v Adrien Gobat | 5-7,5-7 | |
| Challenger Mouilleron le Captif | 10/01 09:25 | 14 | [356] Tristan Lamasine v Antoine Hoang [439] | 2-6,6-3,6-3 | |
| Challenger Orleans | 09/28 08:30 | 26 | [106] Jack Draper v Tristan Lamasine [356] | 6-4,6-4 | |
| Challenger Orleans | 09/26 20:10 | 25 | [356] Tristan Lamasine v Remy Bertola [368] | 2-6,6-3,7-5 | |
| Challenger Orleans | 09/25 08:30 | 19 | [368] Tristan Lamasine v Norbert Gombos [273] | 7-6,6-2 | |
| Challenger Orleans | 09/24 10:25 | 14 | [324] Gabriel Debru v Tristan Lamasine [368] | 4-6,6-7 | |
| Challenger Orleans | 09/24 08:00 | 14 | Gabriel Diallo v Tristan Lamasine | Cancelled | |
| ITF - Plaisir M25 | 09/16 13:55 | 28 | [396] Antoine Hoang v Tristan Lamasine [395] | 6-4,6-2 | |
| ITF - Plaisir M25 | 09/15 10:55 | 27 | [395] Tristan Lamasine v Daniel Little [413] | 6-1,6-4 | |
| ITF - Plaisir M25 | 09/14 15:30 | 26 | Tristan Lamasine v Daniil Glinka | 4-6,6-2,6-1 | |
| ITF - Plaisir M25 | 09/13 11:40 | 25 | Tristan Lamasine v Liova Ayite Ajavon | 6-1,6-4 | |
| ITF - Bagneres-De-Bigorre M25 | 09/10 13:55 | 29 | [282] Michael Geerts v Tristan Lamasine [392] | 6-3,3-6,7-6 | |
| ITF - Bagneres-De-Bigorre M25 | 09/09 14:30 | 28 | [402] John Echeverria v Tristan Lamasine [392] | 3-6,6-4,6-7 | |
| ITF - Bagneres-De-Bigorre M25 | 09/08 15:10 | 27 | Paul Cayre v Tristan Lamasine | 3-6,3-6 | |
| ITF - Bagneres-De-Bigorre M25 | 09/07 17:45 | 26 | Louis Dussin v Tristan Lamasine | 3-6,4-6 |
Tristan Lamasine (ur. 5 marca 1993 na Thiais) – francuski tenisista.