2015 Croatia Open Umag – Singles

Pablo Cuevas was the last edition champion, but he chose to defend another of his previous title in Båstad which was held simultaneously with the Croatia Open Umag this year.

Dominic Thiem won the title, defeating João Sousa in the final, 6–4, 6–1.

Seeds
The top four seeds receive a bye into the second round. • #🇫🇷 Gaël Monfils (semifinals)

• #🇪🇸 Roberto Bautista Agut (semifinals)

• #🇮🇹 Andreas Seppi (second round)

• #🇦🇹 Dominic Thiem (champion)

• #🇮🇹 Fabio Fognini (quarterfinals)

• #🇩🇪 Philipp Kohlschreiber (quarterfinals)

• # Borna Ćorić (quarterfinals)

• #🇸🇰 Martin Kližan (second round)

Seeds
• # 🇦🇷 Facundo Bagnis (qualifying competition)

• # 🇦🇷 Máximo González (qualifying competition)

• # 🇦🇹 Gerald Melzer (qualifying competition)

• # 🇷🇸 Laslo Djere (qualified)

• # 🇮🇹 Thomas Fabbiano (qualified)

• # 🇮🇹 Matteo Viola (first round)

• # 🇮🇹 Roberto Marcora (qualifying competition)

• # Franko Škugor (second round)

Qualifiers
• # 🇮🇹 Matteo Trevisan

• # 🇮🇹 Thomas Fabbiano

• # 🇦🇹 Bastian Trinker

• # 🇷🇸 Laslo Djere