| Wimbledon | 06/24 12:05 | 44 | [111] Kamil Majchrzak v Constant Lestienne [202] | 6-1,6-2 | |
| Challenger Blois | 06/20 16:15 | 26 | [204] Constant Lestienne v Daniel Elahi Galan [197] | 4-6,4-6 | |
| Challenger Blois | 06/19 16:00 | 25 | Constant Lestienne v Holger Vitus Nodskov Rune | 6-4,6-3 | |
| Challenger Lyon | 06/12 13:40 | 25 | [206] Constant Lestienne v Alexey Vatutin [208] | 6-7,6-1,1-6 | |
| Challenger Poznan | 06/04 08:00 | 24 | [192] Constant Lestienne v Sumit Nagal [280] | 3-6,7-5,3-6 | |
| French Open | 05/20 08:00 | 44 | [184] Yannick Hanfmann v Constant Lestienne [196] | 6-2,7-5 | |
| Challenger Heilbronn | 05/14 13:05 | 25 | [113] Thiago Monteiro v Constant Lestienne [203] | 6-4,7-5 | |
| Challenger Heilbronn | 05/13 10:55 | 24 | [205] Daniel Elahi Galan v Constant Lestienne [203] | 7-5,6-7,3-6 | |
| ATP Dubai | 02/23 08:05 | 64 | [110] Ricardas Berankis v Constant Lestienne [168] | 6-3,3-6,6-2 | |
| ATP Marseille | 02/19 11:00 | 25 | [168] Constant Lestienne v Sergiy Stakhovsky [141] | 6-7,6-1,3-6 | |
| ATP Marseille | 02/18 12:45 | 164 | [141] Sergiy Stakhovsky v Constant Lestienne [168] | 5-7,6-1,5-7 | |
| ATP Marseille | 02/17 13:10 | 64 | [184] Mats Moraing v Constant Lestienne [150] | 5-7,6-4,3-6 | |
| ATP Montpellier | 02/03 09:30 | 64 | [179] Alexey Vatutin v Constant Lestienne [146] | 6-4,3-6,6-1 | |
| Challenger Quimper | 01/31 17:45 | 26 | [163] Daniel Evans v Constant Lestienne [146] | 3-6,7-6,7-6 | |
| Challenger Quimper | 01/30 16:45 | 25 | Manuel Guinard v Constant Lestienne | 3-6,2-6 | |
| Challenger Rennes | 01/23 11:00 | 25 | [178] Andrea Arnaboldi v Constant Lestienne [142] | 4-6,7-6,6-3 | |
| Australian Open | 01/08 05:40 | 44 | [225] Joao Domingues v Constant Lestienne [143] | 6-4,6-4 | |
| Challenger Playford | 01/05 03:05 | 28 | [150] Mats Moraing v Constant Lestienne [151] | 6-4,6-2 | |
| Challenger Playford | 01/04 02:00 | 27 | [127] Lloyd Harris v Constant Lestienne [151] | Retired | |
| Challenger Playford | 01/02 23:30 | 26 | [151] Constant Lestienne v Enrique Lopez-Perez [219] | 6-3,6-2 | |
| Challenger Playford | 01/02 02:25 | 25 | [151] Constant Lestienne v Aleksandar Vukic [348] | 6-3,7-5 | |
| Challenger Mouilleron le Captif | 11/09 18:20 | 27 | [130] Elias Ymer v Constant Lestienne [151] | 5-7,6-4,7-5 | |
| Challenger Mouilleron le Captif | 11/07 11:25 | 26 | [151] Constant Lestienne v Joris De Loore [384] | 4-6,6-0,6-3 | |
| Challenger Mouilleron le Captif | 11/05 18:50 | 25 | [158] Corentin Moutet v Constant Lestienne [151] | 3-6,4-6 | |
| ATP Paris | 10/27 13:45 | 45 | [154] Constant Lestienne v Malek Jaziri [55] | 4-6,6-7 | |
| Challenger Brest | 10/22 18:25 | 25 | [154] Constant Lestienne v Jaume Munar [79] | 1-6,3-6 | |
| ATP Antwerp | 10/16 10:00 | 25 | [58] Jan-Lennard Struff v Constant Lestienne [154] | 6-2,6-3 | |
| ATP Antwerp | 10/15 09:00 | 164 | [97] Ilya Ivashka v Constant Lestienne [154] | 4-6,7-6,6-3 | |
| ATP Antwerp | 10/14 10:15 | 64 | [165] Nicolas Mahut v Constant Lestienne [156] | 2-6,6-4,6-7 | |
| Challenger Ortisei | 10/12 13:20 | 27 | [112] Ugo Humbert v Constant Lestienne [156] | 7-6,6-3 |