2019 Open de Rennes – Singles

Vasek Pospisil was the defending champion but chose not to defend his title.

Ričardas Berankis won the title after defeating Antoine Hoang 6–4, 6–2 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇫🇷 Adrian Mannarino (second round)

• # 🇫🇷 Benoît Paire (quarterfinals, retired)

• # 🇨🇦 Félix Auger-Aliassime (second round)

• # 🇱🇹 Ričardas Berankis (champion)

• # 🇸🇪 Elias Ymer (quarterfinals)

• # 🇨🇾 Marcos Baghdatis (quarterfinals)

• # 🇩🇪 Yannick Maden (semifinals)

• # 🇫🇷 Quentin Halys (quarterfinals)

• # 🇺🇦 Sergiy Stakhovsky (third round)

• # 🇮🇹 Stefano Travaglia (withdrew)

• # 🇦🇹 Dennis Novak (second round)

• # 🇫🇷 Constant Lestienne (second round)

• # 🇨🇿 Lukáš Rosol (third round)

• # 🇫🇷 Antoine Hoang (final)

• # 🇫🇷 Corentin Moutet (semifinals)

• # 🇮🇹 Salvatore Caruso (third round)