2019 Prosperita Open – Singles

Arthur De Greef was the defending champion but lost in the third round to Tomáš Macháč.

Kamil Majchrzak won the title after defeating Jannik Sinner 6–1, 6–0 in the final.

Seeds
All seeds receive a bye into the second round. • # Lloyd Harris (semifinals)

• # 🇨🇿 Jiří Veselý (quarterfinals)

• # 🇪🇸 Marcel Granollers (second round)

• # 🇵🇱 Kamil Majchrzak (champion)

• # 🇦🇹 Dennis Novak (quarterfinals)

• # 🇮🇹 Stefano Travaglia (quarterfinals)

• # 🇪🇪 Jürgen Zopp (second round)

• # 🇧🇪 Arthur De Greef (third round)

• # 🇩🇪 Dominik Köpfer (second round)

• # 🇮🇹 Stefano Napolitano (second round)

• # Tallon Griekspoor (second round)

• # Viktor Galović (third round)

• # 🇨🇿 Adam Pavlásek (second round)

• # 🇸🇰 Norbert Gombos (third round)

• # Thiemo de Bakker (second round)

• # 🇮🇹 Matteo Viola (second round)