2019 Croatia Open Umag – Singles

Marco Cecchinato was the defending champion, but lost in the first round to Aljaž Bedene.

Dušan Lajović won his first ATP Tour singles title, defeating Attila Balázs in the final, 7–5, 7–5.

Seeds
The top four seeds receive a bye into the second round. • #🇮🇹 Fabio Fognini (second round, retired)

• # Borna Ćorić (second round)

• #🇷🇸 Laslo Đere (semifinals)

• #🇷🇸 Dušan Lajović (champion)

• #🇮🇹 Marco Cecchinato (first round)

• #🇷🇸 Filip Krajinović (second round)

• #🇸🇰 Martin Kližan (first round)

• #🇦🇷 Leonardo Mayer (quarterfinals)

Seeds
• # 🇮🇹 Salvatore Caruso (qualified)

• # 🇩🇪 Rudolf Molleker (qualifying competition)

• # 🇮🇹 Filippo Baldi (first round)

• # 🇦🇷 Marco Trungelliti (qualified)

• # 🇪🇸 Tommy Robredo (qualifying competition)

• # 🇮🇹 Stefano Napolitano (qualifying competition)

• # 🇦🇷 Carlos Berlocq (first round)

• # 🇭🇺 Attila Balázs (qualified)

Qualifiers
• # 🇮🇹 Salvatore Caruso

• # 🇭🇺 Attila Balázs

• # 🇩🇪 Peter Torebko

• # 🇦🇷 Marco Trungelliti