| Challenger - Biella | 03/09 09:00 | 25 | [254] Hugo Grenier v Tristan Lamasine [251] | 4-6,2-6 | |
| Challenger - Potchefstroom | 02/17 10:30 | 26 | [278] Dimitar Kuzmanov v Tristan Lamasine [246] | 7-5,7-6 | |
| Challenger - Potchefstroom | 02/15 12:25 | 25 | [253] Roberto Quiroz v Tristan Lamasine [246] | 5-7,5-7 | |
| Challenger - Potchefstroom | 02/10 08:00 | 26 | [220] Peter Polansky v Tristan Lamasine [246] | 6-4,6-4 | |
| Challenger - Potchefstroom | 02/08 09:30 | 25 | Tristan Lamasine v Vaughn Hunter | 7-6,1-6,6-1 | |
| Challenger - Quimper | 02/01 09:30 | 19 | [245] Tristan Lamasine v Tobias Kamke [235] | 5-7,4-6 | |
| Challenger - Quimper - Qualifikation | 01/31 09:00 | 14 | [215] Illya Marchenko v Tristan Lamasine [249] | 0-6,6-4,6-7 | |
| Challenger - Quimper | 01/26 18:55 | 25 | [249] Tristan Lamasine v Sebastian Korda [103] | 6-7,6-4,6-7 | |
| Challenger - Quimper | 01/25 09:30 | 19 | [216] Marius Copil v Tristan Lamasine [249] | 3-6,4-6 | |
| Challenger - Quimper | 01/24 12:05 | 14 | [249] Tristan Lamasine v Hugo Grenier [242] | 6-4,7-6 | |
| ATP - Antalya | 01/10 08:00 | 26 | [271] Tristan Lamasine v Alexander Bublik [49] | 2-6,4-6 | |
| ATP - Antalya | 01/08 07:00 | 25 | [271] Tristan Lamasine v Egor Gerasimov [78] | 7-6,6-2 | |
| Challenger - Maia | 11/30 15:00 | 25 | [264] Tristan Lamasine v Arthur Rinderknech [178] | 3-6,6-3,2-6 | |
| Challenger - Parma 2 | 11/02 13:25 | 25 | Luca Vanni v Tristan Lamasine | 6-2,6-4 | |
| Challenger - Parma 2 | 11/01 11:55 | 164 | Tristan Lamasine v Matteo Gigante | 7-6,6-3 | |
| Challenger - Parma 2 | 10/31 15:30 | 64 | Tristan Lamasine v Flavio Cobolli | 6-2,6-1 | |
| Challenger - Marbella | 10/24 11:20 | 19 | [272] Tristan Lamasine v Javier Barranco Cosano [312] | 0-6,6-7 | |
| Challenger - Istanbul | 10/21 07:30 | 26 | [128] Jason Jung v Tristan Lamasine [272] | 6-0,6-3 | |
| Challenger - Istanbul | 10/20 10:00 | 25 | [272] Tristan Lamasine v Peter Polansky [211] | 4-6,6-2,7-5 | |
| Challenger - Istanbul | 10/18 10:00 | 164 | [242] Alexey Vatutin v Tristan Lamasine [272] | 6-2,6-7,2-6 | |
| Challenger - Istanbul | 10/17 07:30 | 64 | Koray Kirci v Tristan Lamasine | 2-6,2-6 | |
| Challenger - Lissabon | 10/11 10:30 | 164 | [168] Sebastian Ofner v Tristan Lamasine [271] | 6-4,6-3 | |
| Challenger - Lissabon | 10/10 09:00 | 64 | [301] Pedro Sakamoto v Tristan Lamasine [271] | 4-6,7-5,4-6 | |
| Challenger - Barcelona | 10/03 08:30 | 26 | [271] Tristan Lamasine v Peter Polansky [205] | 6-1,3-6,1-6 | |
| French Open | 09/23 12:05 | 15 | [172] Roberto Marcora v Tristan Lamasine [268] | 7-6,3-6,6-3 | |
| French Open | 09/21 15:05 | 14 | [268] Tristan Lamasine v Ramkumar Ramanathan [197] | 7-5,6-2 | |
| ITF - M25 - Plaisir | 09/15 13:35 | 25 | [268] Tristan Lamasine v Christopher Heyman [390] | 3-6,6-7 | |
| Challenger - Triest | 08/22 09:00 | - | [265] Tristan Lamasine v Riccardo Bonadio [409] | 4-6,2-6 | |
| Challenger - Pau | 02/24 14:10 | 24 | [288] Pavel Kotov v Tristan Lamasine [253] | 2-6,7-6,6-4 | |
| Challenger - Bergamo | 02/18 13:50 | 25 | [446] Luca Vanni v Tristan Lamasine [220] | 6-3,6-4 |
Tristan Lamasine (* 5. März 1993 in Thiais) ist ein französischer Tennisspieler.