| ATP - Metz | 09/19 17:30 | - | [167] Constant Lestienne v Richard Gasquet [25] | 4-6,2-6 | |
| ATP - Metz | 09/18 09:00 | - | [167] Constant Lestienne v Jurgen Zopp [122] | 6-3,7-5 | |
| ATP - Metz | 09/17 11:45 | - | [281] Maxime Janvier v Constant Lestienne [167] | 4-6,4-6 | |
| ATP - Metz | 09/16 13:55 | - | Boris Fassbender v Constant Lestienne | 2-6,1-6 | |
| Challenger - Istambul | 09/13 08:00 | - | [297] Matteo Viola v Constant Lestienne [172] | 6-3,6-1 | |
| Challenger - Istambul | 09/11 08:00 | - | [272] Daniel Masur v Constant Lestienne [172] | 6-0,3-6,6-7 | |
| Open dos EUA | 08/23 15:00 | - | [172] Constant Lestienne v Ruben Bemelmans [129] | 4-6,3-6 | |
| Open dos EUA | 08/21 19:05 | - | [229] Alessandro Giannessi v Constant Lestienne [172] | 3-6,2-6 | |
| Challenger - Portoroz | 08/11 18:00 | - | [224] Constant Lestienne v Andrea Arnaboldi [203] | 6-2,6-1 | |
| Challenger - Portoroz | 08/10 21:20 | - | [224] Constant Lestienne v Dominik Koepfer [263] | 6-3,6-2 | |
| Challenger - Portoroz | 08/09 18:00 | - | [118] Sergiy Stakhovsky v Constant Lestienne [224] | 6-3,2-6,1-6 | |
| Challenger - Portoroz | 08/08 14:00 | - | [224] Constant Lestienne v Nino Serdarusic [192] | 6-4,6-2 | |
| Challenger - Portoroz | 08/07 08:00 | - | [224] Constant Lestienne v Federico Gaio [235] | 6-3,6-2 | |
| Challenger - Liberec | 07/31 08:00 | - | [151] Pedro Sousa v Constant Lestienne [218] | 6-2,6-4 | |
| Challenger - Praga | 07/24 08:00 | - | [218] Constant Lestienne v Rogerio Dutra Silva [150] | 2-6,4-6 | |
| ATP - Bastad - Qualificação | 07/15 10:45 | - | Constant Lestienne v Christian Garin | Cancelled | |
| Challenger - Bastad | 07/12 09:00 | - | [125] Corentin Moutet v Constant Lestienne [225] | 7-5,6-3 | |
| Challenger - Bastad | 07/11 11:05 | - | Uladzimir Ignatik v Constant Lestienne | 1-6,4-6 | |
| Challenger - Bastad | 07/09 14:05 | - | [225] Constant Lestienne v Felix Auger Aliassime [152] | Retired | |
| Challenger - Marburg | 07/03 11:55 | - | Constant Lestienne v Henri Laaksonen | 4-6,7-6,3-6 | |
| Wimbledon - Qualificação | 06/26 16:05 | - | [122] Lorenzo Sonego v Constant Lestienne [226] | 6-4,4-6,6-2 | |
| Wimbledon - Qualificação | 06/25 12:30 | - | [234] Yasutaka Uchiyama v Constant Lestienne [207] | 5-7,0-6 | |
| Challenger - Blois | 06/18 16:00 | - | [304] Mathias Bourgue v Constant Lestienne [207] | Retired | |
| Challenger - Prostejov - Qualificação | 06/05 10:45 | - | Constant Lestienne v Gerald Melzer | Cancelled | |
| Open de França - Qualificação | 05/23 11:40 | - | [216] Constant Lestienne v Sergiy Stakhovsky [129] | 7-6,5-7,2-6 | |
| Open de França - Qualificação | 05/21 16:30 | - | [161] Filip Peliwo v Constant Lestienne [216] | 5-7,2-6 | |
| Challenger - Bordéus | 05/15 08:00 | - | [212] Constant Lestienne v Reilly Opelka [206] | 1-6,4-6 | |
| Challenger - Aix en Provence | 05/10 12:10 | - | [70] John Millman v Constant Lestienne [213] | 6-2,6-2 | |
| Challenger - Aix en Provence - Qualificação | 05/08 15:05 | - | Stefan Kozlov v Constant Lestienne | 6-7,4-6 | |
| Challenger - Saint-Brieuc | 04/01 13:00 | - | [234] Constant Lestienne v Ricardas Berankis [103] | 2-6,7-5,4-6 |