2019 Open BNP Paribas Banque de Bretagne – Singles

Quentin Halys was the defending champion but lost in the second round to Dan Evans.

Grégoire Barrère won the title after defeating Evans 4–6, 6–2, 6–3 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇵🇱 Hubert Hurkacz (third round)

• # 🇫🇷 Ugo Humbert (semifinals)

• # 🇪🇸 Marcel Granollers (second round)

• # 🇱🇹 Ričardas Berankis (second round)

• # 🇫🇷 Quentin Halys (second round)

• # 🇩🇪 Matthias Bachinger (quarterfinals)

• # 🇪🇸 Adrián Menéndez Maceiras (third round)

• # 🇺🇦 Sergiy Stakhovsky (third round)

• # 🇫🇷 Constant Lestienne (third round)

• # 🇪🇪 Jürgen Zopp (quarterfinals)

• # 🇫🇷 Antoine Hoang (withdrew)

• # 🇮🇹 Salvatore Caruso (second round)

• # 🇩🇪 Mats Moraing (second round)

• # 🇧🇾 Egor Gerasimov (second round)

• # 🇫🇷 Grégoire Barrère (champion)

• # 🇮🇹 Filippo Baldi (second round)