| Challenger - Launceston | 02/01 00:00 | 27 | Luke Saville v Tristan Lamasine | 6-4,6-4 | |
| Challenger - Launceston | 01/31 00:35 | 26 | [283] Tsung-Hua Yang v Tristan Lamasine [302] | 3-6,2-6 | |
| Challenger - Launceston | 01/29 00:10 | 25 | [302] Tristan Lamasine v Marc Polmans [168] | 6-3,4-6,6-3 | |
| Challenger - Launceston | 01/28 01:40 | 24 | [300] Tristan Lamasine v Renta Tokuda [339] | 6-4,6-1 | |
| Challenger - Burnie | 01/21 23:00 | 24 | [300] Tristan Lamasine v Dudi Sela [239] | 7-6,2-6,1-6 | |
| Challenger - Canberra | 01/10 00:35 | 27 | [307] Tristan Lamasine v Hubert Hurkacz [88] | 6-7,4-6 | |
| Challenger - Canberra | 01/08 23:00 | 26 | [261] Zhe Li v Tristan Lamasine [307] | 3-6,4-6 | |
| Challenger - Canberra | 01/07 23:00 | 25 | Michael Look v Tristan Lamasine | 2-6,2-6 | |
| Challenger - Noumea | 12/31 23:00 | 24 | [255] Mikael Ymer v Tristan Lamasine [309] | 6-4,4-6,6-4 | |
| Challenger - Brest | 10/20 09:40 | 45 | [415] Zizou Bergs v Tristan Lamasine [333] | 6-4,6-4 | |
| Challenger - Ismaning | 10/17 12:45 | 25 | [333] Tristan Lamasine v Ugo Humbert [99] | 6-7,3-6 | |
| Challenger - Ismaning | 10/15 11:00 | 54 | [333] Tristan Lamasine v Albano Olivetti [409] | 6-4,7-6 | |
| Challenger - Ismaning | 10/14 09:00 | 46 | Tristan Lamasine v Marc Sieber | 6-3,6-2 | |
| Challenger - Ismaning | 10/13 09:00 | 45 | Tristan Lamasine v Sven Lemstra | 6-3,6-4 | |
| Challenger - Tashkent | 10/08 05:30 | 54 | [128] Felix A-Aliassime v Tristan Lamasine [334] | 7-6,6-2 | |
| Challenger - Tashkent | 10/07 05:00 | 46 | Sergey Fomin v Tristan Lamasine | 3-6,4-6 | |
| Challenger - Tashkent | 10/06 05:00 | 45 | Saida'lo Saidkarimov v Tristan Lamasine | 4-6,3-6 | |
| Challenger - Almaty 2 | 09/29 04:00 | 45 | [337] Tristan Lamasine v Luca Margaroli [158] | 6-3,3-6,4-6 | |
| Challenger - Kaohsiung | 09/17 04:15 | 54 | [293] Yunseong Chung v Tristan Lamasine [345] | 6-4,6-2 | |
| Challenger - Kaohsiung | 09/16 08:25 | 46 | [345] Tristan Lamasine v Bradley Mousley [336] | 6-3,7-5 | |
| Challenger - Kaohsiung | 09/15 10:35 | 45 | [492] Jacopo Berrettini v Tristan Lamasine [345] | 2-6,5-7 | |
| Challenger - Shanghai | 09/13 04:55 | 26 | [345] Tristan Lamasine v Miomir Kecmanovic [177] | 4-6,3-6 | |
| Challenger - Shanghai | 09/11 05:25 | 25 | [290] Roman Safiullin v Tristan Lamasine [345] | 7-6,6-7,3-6 | |
| Challenger - Shanghai | 09/10 03:00 | 54 | [413] Viktor Durasovic v Tristan Lamasine [346] | 6-7,4-6 | |
| Challenger - Shanghai | 09/09 04:40 | 46 | Vinayak Sharma Kaza v Tristan Lamasine | 6-7,4-6 | |
| Challenger - Shanghai | 09/08 06:50 | 45 | [384] Sasi Kumar Mukund v Tristan Lamasine [346] | 1-6,4-6 | |
| Challenger - Zhangjiagang | 09/05 04:20 | 25 | [197] Hiroki Moriya v Tristan Lamasine [346] | 7-6,6-2 | |
| Challenger - Zhangjiagang | 09/04 02:00 | 54 | [487] Tung-Lin Wu v Tristan Lamasine [346] | 2-6,6-7 | |
| Challenger - Zhangjiagang | 09/03 05:30 | 46 | Kristian Lozan v Tristan Lamasine | 6-7,3-6 | |
| Challenger - Zhangjiagang | 09/02 05:25 | 45 | Shi Hong Zeng v Tristan Lamasine | 1-6,2-6 |
Tristan Lamasine (* 5. März 1993 in Thiais) ist ein französischer Tennisspieler.