Quentin Halys is a professional tennis player from France. Halys achieved a career-high ATP singles ranking of world No. 71 on August 15, 2022.

On the ATP Challenger Tour, he has five singles championships and seven doubles trophies.

Haly is thought to have a girlfriend. He is, however, guarded about his love life, making it difficult for tabloids to track down his partner.

Quentin competed as a wildcard in his debut ITF Junior Circuit competition in 2010, at the G4 Tournoi International de Clermont-Ferrand. He was eliminated in the first round.

Later the same year, at the G5 International Junior Saint-Cyprien, he made his first final in doubles. Halys and Armel Rancezot fell in a super tiebreak against Julien Delaplane and Alexandre Favrot in an all-French final.

Halys completed his Grand Slam debut as a wildcard in the 2015 French Open. He also played as a wildcard in the main draw of the 2016 Australian Open, where he beat Ivan Dodig.

In the second round, he was defeated by top seed and eventual winner Novak Djokovic. He won his second Major as a wildcard in the 2016 French Open, defeating Chung Hyeon in the first round.

Halys qualified for the 2021 US Open for the first time in five attempts. He was defeated in five sets in the first round by Dominik Koepfer.

Halys broke into the top 100 on May 9, 2022, following a quarterfinal performance at the 2022 Olympics.