2023 Libéma Open – Men's singles

Tallon Griekspoor defeated Jordan Thompson in the final, 6–7(4–7), 7–6(7–3), 6–3 to win the men's singles tennis title at the 2023 Libéma Open. It was his second ATP Tour title.

Tim van Rijthoven was the reigning champion, but did not compete due to an elbow injury.

This tournament marked the return of 2016 Wimbledon finalist and former world No. 3 Milos Raonic, after being away from the tour since 2021. He lost in the second round to Thompson.

Seeds
The top four seeds received a bye into the second round. • # Daniil Medvedev (second round)

• #🇮🇹 Jannik Sinner (quarterfinals)

• # Borna Ćorić (second round)

• #🇦🇺 Alex de Minaur (quarterfinals)

• #🇷🇸 Miomir Kecmanović (first round)

• # Tallon Griekspoor (champion)

• #🇫🇷 Ugo Humbert (second round)

• #🇺🇸 Maxime Cressy (first round)

Seeds
• # 🇫🇷 Arthur Fils (qualified)

• # 🇧🇪 David Goffin (qualified)

• # Pavel Kotov (first round)

• # 🇦🇺 Rinky Hijikata (qualifying competition, lucky loser)

• # 🇮🇹 Andrea Vavassori (first round)

• # Jelle Sels (first round)

• # Jesper de Jong (qualifying competition)

• # 🇱🇹 Ričardas Berankis (qualified)

Qualifiers
• # 🇫🇷 Arthur Fils

• # 🇧🇪 David Goffin

• # 🇫🇷 Giovanni Mpetshi Perricard

• # 🇱🇹 Ričardas Berankis

Lucky loser
• # 🇦🇺 Rinky Hijikata