| ITF M25 - Bagnères-de-Bigorre | 09/06 14:50 | 25 | Loan Lestir v Tristan Lamasine | 3-6,1-6 | |
| Challenger Augsburg | 08/21 10:40 | 19 | Tristan Lamasine v Nicolas Zanellato | 3-6,2-6 | |
| Challenger Augsburg | 08/20 11:25 | 14 | Tristan Lamasine v David Fix | 7-6,6-4 | |
| ITF M25 - Wetzlar | 08/06 10:00 | 29 | [489] Sebastian Fanselow v Tristan Lamasine [438] | 3-6,1-6 | |
| ITF M25 - Wetzlar | 08/05 14:45 | 28 | Buvaysar Gadamauri v Tristan Lamasine | 6-7,2-6 | |
| ITF M25 - Wetzlar | 08/04 12:30 | 27 | Nicola Kuhn v Tristan Lamasine | 6-7,4-6 | |
| ITF M25 - Wetzlar | 08/04 08:00 | 26 | Diego Dedura-Palomero v Tristan Lamasine | 4-6,2-6 | |
| ITF M25 - Wetzlar | 08/03 11:25 | 25 | Florian Broska v Tristan Lamasine | 5-7,1-6 | |
| ITF M25 - Uriage | 07/15 08:00 | 28 | [464] Tristan Lamasine v Ugo Blanchet [303] | 6-3,6-7,4-6 | |
| ITF M25 - Uriage | 07/14 08:00 | 27 | [464] Tristan Lamasine v Mathys Erhard [374] | 6-1,6-1 | |
| ITF M25 - Uriage | 07/13 11:25 | 26 | [464] Tristan Lamasine v Alexander Zgirovsky [329] | 6-1,7-5 | |
| ITF M25 - Uriage | 07/12 08:50 | 25 | Tristan Lamasine v Mehdi Sadaoui | 6-2,6-3 | |
| ITF - M25 Bourg-en-Bresse | 07/02 14:30 | 29 | [476] Tristan Lamasine v Valentin Vacherot [321] | 1-6,6-2,5-7 | |
| ITF - M25 Bourg-en-Bresse | 07/01 13:00 | 28 | [476] Tristan Lamasine v Matteo Martineau [390] | 3-6,7-5,6-4 | |
| ITF - M25 Bourg-en-Bresse | 06/30 15:30 | 27 | [297] Ugo Blanchet v Tristan Lamasine [476] | 3-6,2-6 | |
| ITF - M25 Bourg-en-Bresse | 06/29 16:25 | 26 | Adrien Burdet v Tristan Lamasine | 0-6,0-6 | |
| ITF - M25 Bourg-en-Bresse | 06/28 16:10 | 25 | Rudy Ceccon v Tristan Lamasine | 0-6,0-6 | |
| ITF M25 - Montauban | 06/24 09:55 | 28 | [276] Titouan Droguet v Tristan Lamasine [483] | 6-1,6-4 | |
| ITF M25 - Montauban | 06/23 10:00 | 27 | Tom Paris v Tristan Lamasine | 7-6,0-6,3-6 | |
| ITF M25 - Montauban | 06/22 09:20 | 26 | Lucas Bouquet v Tristan Lamasine | 6-4,1-6,4-6 | |
| ITF M25 - Montauban | 06/20 10:55 | 25 | Loan Lestir v Tristan Lamasine | 2-6,3-6 | |
| ITF M25 - Grasse | 06/16 13:55 | 27 | [483] Tristan Lamasine v Murkel Dellien [321] | 1-6,6-7 | |
| ITF M25 - Grasse | 06/16 08:40 | 26 | Tristan Lamasine v Alexandre Aubriot | 6-2,6-2 | |
| ITF M25 - Grasse | 06/15 08:25 | 25 | [326] Antoine Hoang v Tristan Lamasine [483] | 6-7,7-6,4-6 | |
| ITF - M25 Carnac | 05/30 16:30 | 25 | [342] Mathys Erhard v Tristan Lamasine [487] | 6-3,6-3 | |
| ITF - M25 Gurb | 05/20 08:30 | 28 | Daniel Cukierman v Tristan Lamasine | 6-2,6-2 | |
| ITF - M25 Gurb | 05/19 12:15 | 27 | Tristan Lamasine v Tomas C Abasolo | 6-0,6-2 | |
| ITF - M25 Gurb | 05/18 11:00 | 26 | Xavi Matas Ortega v Tristan Lamasine | 4-6,1-6 | |
| ITF - M25 Gurb | 05/16 10:45 | 25 | Tristan Lamasine v Alejandro Manzanera Pertusa | 6-3,6-2 | |
| ITF - M25 Valldoreix | 05/12 08:00 | 27 | Tristan Lamasine v Nikolas S Izquierdo | 6-3,1-6,2-6 |
Tristan Lamasine (5 maart 1993) is een Franse tennisspeler. Hij heeft nog geen ATP-toernooi gewonnen. Wel deed hij mee aan een grandslamtoernooi. Hij heeft zes challengers in het dubbelspel op zijn naam staan en één in het enkelspel.