Constant Lestienne
Constant Lestienne is a French professional tennis player. He competes mainly on the ITF Men's Circuit and ATP Challenger Tour. He has won two ATP Challenger Tour singles titles. In addition, he has won five singles titles and three doubles titles in the ITF Men's Circuit.
Career
Lestienne reached his first career ATP Tour singles main draw at the 2015 Estoril Open after winning two singles qualifying matches.Betting scandal
In September 2016 Lestienne was suspended for seven months and fined $10,000 by the International Tennis Federation for betting on tennis matches. The Tennis Integrity Unit in cooperation with French online gambling regulator ARJEL found that Lestienne had bet on 220 tennis matches between February 2012 and June 2015. None of these matches were his own. Half of the ban was suspended and his fine would be halved if he assisted the TIU.ATP Challenger Tour and ITF Men's Circuit finals
Singles (7–12)
| Legend |
| ATP Challenger Tour |
| ITF Men's Circuit |
| Outcome | No. | Date | Tournament | Surface | Opponent | Score |
| Runner-up | 1. | Feucherolles, France | Hard |  David Guez | 0–6, 1–6 | |
| Runner-up | 2. | Eupen, Belgium | Clay |  Dimitar Grabul | 6–0, 1–6, 3–6 | |
| Runner-up | 3. | Kenn, Germany | Clay |  Yannick Maden | 4–6, 6–4, 3–6 | |
| Runner-up | 4. | Toulon, France | Clay | Enzo Couacaud | 4–6, 2–6 | |
| Winner | 5. | Ostend, Belgium | Clay | Alexandre Sidorenko | 6–4, 6–2 | |
| Runner-up | 6. | Saint-Raphaël, France | Hard | Yanais Laurent | 2–6, 2–6 | |
| Winner | 7. | Rotterdam, Netherlands | Clay |  Alexey Vatutin | 6–0, 6–4 | |
| Runner-up | 8. | Bagnoles-de-l'Orne, France | Clay |  Yannik Reuter | 3–6, 2–6 | |
| Winner | 9. | Bressuire, France | Hard | Hugo Nys | 6–7, 6–1, 6–4 | |
| Winner | 10. | Ostrava, Czech Republic | Clay |  Zdeněk Kolář | 6–7, 6–1, 6–2 | |
| Runner-up | 11. | Montauban, France | Clay |  Jordi Samper Montaña | 6–7, 7–6, 2–6 | |
| Runner-up | 12. | San Benedetto del Tronto, Italy | Clay |  Federico Gaio | 2–6, 6–1, 3–6 | |
| Runner-up | 13. | Bagnoles-de-l'Orne, France | Clay | Maxime Hamou | 6–3, 4–6, 3–6 | |
| Winner | 14. | Gyula, Hungary | Clay |  Facundo Mena | 7–5, 6–4 | |
| Runner-up | 15. | Bourg-en-Bresse, France | Clay | Geoffrey Blancaneaux | 6–3, 2–6, 5–7 | |
| Winner | 16. | Prague, Czech Republic | Hard | Petr Michnev | 6–3, 6–3 | |
| Runner-up | 17. | Cherbourg, France | Hard | Maximilian Marterer | 4–6, 5–7 | |
| Runner-up | 18. | Saint-Brieuc, France | Hard |  Ričardas Berankis | 2–6, 7–5, 4–6 | |
| Winner | 19. | Portorož, Slovenia | Hard | Andrea Arnaboldi | 6–2, 6–1 |
Doubles (3–3)
| Legend |
| ATP Challenger Tour |
| ITF Men's Circuit |
| Outcome | No. | Date | Tournament | Surface | Partner | Opponent | Score |
| Winner | 1. | Toulon, France | Clay | Yanais Laurent | Federico Coria Dante Gennaro | 3–6, 6–3, | |
| Winner | 2. | Montauban, France | Clay | Yanais Laurent | Remy Chala Valentin Masse | 6–1, 6–3 | |
| Runner-up | 3. | Lille, France | Hard | Jonathan Eysseric | Yannick Mertens Boy Westerhof | 4–6, 4–6 | |
| Runner-up | 4. | Poitiers, France | Hard | Grégoire Jacq | Grégoire Burquier Alexandre Sidorenko | 4–6, 2–6 | |
| Runner-up | 5. | Montauban, France | Clay | Yanais Laurent | Tristan Lamasine Maxime Teixeira | 4–6, 4–6 | |
| Winner | 6. | Bagnoles-de-l'Orne, France | Clay | Alexis Musialek | Grégoire Jacq Hugo Nys | 3–6, 7–5, |