| Challenger - Oeiras | 01/01 13:40 | 14 | [324] Alexey Vatutin v Tristan Lamasine [446] | 3-6,6-2,6-7 | |
| Challenger - Brest | 10/25 15:50 | 25 | [438] Tristan Lamasine v Beibit Zhukayev [331] | 7-6,6-7,4-6 | |
| Challenger - Brest | 10/25 13:20 | 25 | Tristan Lamasine v Denis Yevseyev | Cancelled | |
| Challenger - Brest | 10/24 09:00 | 19 | Tristan Lamasine v Calvin Hemery | 6-3,7-5 | |
| Challenger - Brest | 10/23 11:40 | 14 | [289] Maxime Janvier v Tristan Lamasine [435] | 4-6,6-4,3-6 | |
| Challenger - Hamburg | 10/17 09:00 | 19 | [435] Tristan Lamasine v Evgeny Donskoy [458] | 4-6,4-6 | |
| Challenger - Hamburg | 10/16 08:00 | 14 | [337] Kenny de Schepper v Tristan Lamasine [432] | 2-6,6-3,6-7 | |
| ITF - M25 - Rodez | 10/11 16:20 | 25 | Tristan Lamasine v Alexis Gautier | 2-6,4-6 | |
| Challenger Braga | 09/19 11:15 | 19 | [308] Nicolas Moreno De Alboran v Tristan Lamasine [424] | 6-2,6-3 | |
| Challenger Braga | 09/18 13:25 | 14 | Miguel Gomes v Tristan Lamasine | 4-6,2-6 | |
| Challenger - Toulouse | 08/29 08:30 | 19 | [292] Kimmer Coppejans v Tristan Lamasine [363] | 6-0,1-6,6-4 | |
| Challenger - Toulouse | 08/28 09:55 | 14 | Maxime Chazal v Tristan Lamasine | 2-6,3-6 | |
| Challenger - Prag | 08/22 08:00 | 19 | [298] Joao Domingues v Tristan Lamasine [469] | 6-2,6-1 | |
| Challenger - Prag | 08/21 08:30 | 14 | [413] Milos Karol v Tristan Lamasine [469] | 2-6,3-6 | |
| Challenger - Meerbusch | 08/08 11:20 | 19 | [350] Adrian Andreev v Tristan Lamasine [483] | 7-6,6-3 | |
| Challenger - Meerbusch | 08/07 14:25 | 14 | [483] Tristan Lamasine v Raphael Collignon [370] | 6-1,6-4 | |
| ITF - M25 - Wetzlar | 08/04 08:30 | 26 | [483] Tristan Lamasine v Adrian Andreev [350] | 4-6,3-6 | |
| ITF - M25 - Wetzlar | 08/03 11:55 | 25 | Jakub Wojcik v Tristan Lamasine | 2-6,0-6 | |
| ITF - M25 - Esch/Alzette | 07/22 13:30 | 27 | [254] Pol M Tiffon v Tristan Lamasine [440] | 6-4,3-6,7-5 | |
| ITF - M25 - Esch/Alzette | 07/21 11:15 | 26 | August Holmgren v Tristan Lamasine | 7-5,3-6,4-6 | |
| ITF - M25 - Esch/Alzette | 07/20 07:50 | 25 | Alen Moritz Hodzic v Tristan Lamasine | 1-6,1-6 | |
| Challenger - Amersfoort | 07/14 10:25 | 26 | [481] Tristan Lamasine v Bernabe Zapata Miralles [88] | 1-6,2-6 | |
| Challenger - Amersfoort | 07/12 14:35 | 25 | [481] Tristan Lamasine v Nicolas Kicker [192] | 7-6,5-7,6-3 | |
| Challenger - Amersfoort | 07/11 11:30 | 19 | [481] Tristan Lamasine v Harold Mayot [402] | 7-5,7-6 | |
| Challenger - Amersfoort | 07/10 14:10 | 45 | [322] Benjamin Hassan v Tristan Lamasine [479] | 3-6,7-6,4-6 | |
| Challenger - Braunschweig | 07/03 14:15 | 14 | [479] Tristan Lamasine v Alexey Vatutin [292] | 1-6,5-7 | |
| Challenger - Troyes | 06/27 18:00 | 25 | [323] Raul Brancaccio v Tristan Lamasine [479] | 4-6,6-4,6-3 | |
| Challenger - Oeiras | 06/19 12:00 | 14 | Thomaz Bellucci v Tristan Lamasine | 6-4,6-3 | |
| Challenger - Lyon | 06/05 08:00 | 14 | [408] Arthur Fils v Tristan Lamasine [349] | Cancelled | |
| ATP - Lyon | 05/14 08:30 | 14 | [325] Tristan Lamasine v Manuel Guinard [158] | 1-6,3-6 |
Tristan Lamasine (* 5. März 1993 in Thiais) ist ein französischer Tennisspieler.