| Challenger - Como | 08/31 08:00 | 25 | [135] Juan Manuel Cerundolo v Tristan Lamasine [260] | 6-4,7-6 | |
| Challenger - Warschau | 08/26 12:20 | 26 | [272] Nino Serdarusic v Tristan Lamasine [257] | 6-1,3-6,7-5 | |
| Challenger - Warschau | 08/25 10:00 | 25 | [125] Jan Zielinski v Tristan Lamasine [257] | 2-6,2-6 | |
| Challenger - Lüdenscheid | 08/18 10:45 | 26 | [269] Mirza Basic v Tristan Lamasine [257] | 7-6,6-2 | |
| Challenger - Lüdenscheid | 08/17 08:00 | 25 | Tristan Lamasine v Evgeny Karlovskiy | 6-3,6-3 | |
| Challenger - Poznań | 07/27 11:45 | 25 | [213] Jiri Lehecka v Tristan Lamasine [252] | 6-3,7-5 | |
| Challenger - Todi | 07/13 15:00 | 25 | [252] Tristan Lamasine v Mario Vilella Martinez [178] | 2-6,6-7 | |
| Challenger - Milaan | 06/23 09:00 | 26 | [252] Tristan Lamasine v Pedro Cachin [277] | 1-6,4-6 | |
| Challenger - Milaan | 06/22 08:30 | 25 | [252] Tristan Lamasine v Andrea Arnaboldi [271] | 3-6,6-1,7-5 | |
| Challenger - Aix en Provence | 06/18 09:00 | 27 | [301] Manuel Guinard v Tristan Lamasine [252] | 6-7,6-3,6-3 | |
| Challenger - Aix en Provence | 06/16 08:30 | 26 | [185] Bjorn Fratangelo v Tristan Lamasine [252] | 5-7,3-6 | |
| Challenger - Aix en Provence | 06/15 08:30 | 25 | [252] Tristan Lamasine v Sumit Nagal [144] | 4-6,7-6,6-1 | |
| Challenger - Lyon | 06/10 09:30 | 26 | [104] Facundo Bagnis v Tristan Lamasine [252] | 6-4,6-0 | |
| Challenger - Lyon | 06/08 13:45 | 25 | [237] Marco Trungelliti v Tristan Lamasine [252] | 6-7,2-6 | |
| French Open | 05/24 18:25 | 14 | [127] Jozef Kovalik v Tristan Lamasine [250] | 7-5,7-6 | |
| Challenger - Biella | 05/17 10:10 | 25 | [244] Tristan Lamasine v Dimitar Kuzmanov [237] | 5-7,6-4,1-6 | |
| Challenger - Rome | 04/27 08:00 | 25 | [176] Juan Manuel Cerundolo v Tristan Lamasine [247] | 7-5,7-5 | |
| Challenger - Rome | 04/26 09:30 | 19 | [247] Tristan Lamasine v Riccardo Bonadio [291] | 6-4,6-1 | |
| Challenger - Rome - Kwal. | 04/25 08:00 | 14 | Tristan Lamasine v Tomas Lipovsek Puches | 6-2,6-3 | |
| Challenger - Rome | 04/23 09:00 | 27 | [255] Tristan Lamasine v Hugo Gaston [158] | 2-6,6-7 | |
| Challenger - Rome | 04/21 11:50 | 26 | [159] Paolo Lorenzi v Tristan Lamasine [255] | 6-4,1-6,5-7 | |
| Challenger - Rome | 04/20 16:05 | 25 | [189] Alex Bolt v Tristan Lamasine [255] | 3-6,4-6 | |
| Challenger - Rome | 04/19 10:05 | 19 | [234] Marco Trungelliti v Tristan Lamasine [255] | Retired | |
| Challenger - Rome | 04/19 08:00 | 14 | [265] Zizou Bergs v Tristan Lamasine [254] | 6-3,6-7,2-6 | |
| Challenger - Split | 04/12 08:30 | 19 | [212] Kacper Zuk v Tristan Lamasine [254] | 7-6,6-4 | |
| Challenger - Split - Kwal. | 04/11 12:25 | 14 | Frane Nincevic v Tristan Lamasine | 1-6,5-7 | |
| Challenger - Oeiras | 04/06 10:35 | 25 | Tiago Cacao v Tristan Lamasine | 6-2,6-4 | |
| Challenger - Lille | 03/25 13:25 | 26 | [257] Tristan Lamasine v Benjamin Bonzi [124] | 4-6,3-6 | |
| Challenger - Lille | 03/23 13:00 | 25 | Tristan Lamasine v Jurgen Briand | 4-6,6-3,6-4 | |
| Challenger - Biella - Kwal. | 03/14 11:05 | 14 | [251] Tristan Lamasine v Luca Vanni [445] | 4-6,4-6 |
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.