Croatia Open Umag 2015
Dominic Thiem won the title, beating Joao Sousa 6–4 6–1 in the final.
Main draw 28 players
- 1🇫🇷Gael MonfilsSemifinals · Lost to Dominic Thiem
- 2🇪🇸Roberto Bautista Agut#239Semifinals · Lost to Joao Sousa
- 3🇮🇹Andreas SeppiRound of 16 · Lost to Joao Sousa
- 4🇦🇹Dominic ThiemFinal · Champion
- 5🇮🇹Fabio FogniniQuarterfinals · Lost to Joao Sousa
- 6🇩🇪Philipp KohlschreiberQuarterfinals · Lost to Gael Monfils
- 7🇭🇷Borna CoricQuarterfinals · Lost to Roberto Bautista Agut
- 8🇸🇰Martin KlizanRound of 16 · Lost to Andreas Haider Maurer
- 🇵🇹Joao SousaFinal · Lost to Dominic Thiem
- 🇦🇹Andreas Haider MaurerQuarterfinals · Lost to Dominic Thiem
- 🇸🇮Aljaz BedeneRound of 16 · Lost to Borna Coric
- Q🇦🇹Bastian TrinkerRound of 16 · Lost to Gael Monfils
- 🇸🇮Blaz KavcicRound of 16 · Lost to Roberto Bautista Agut
- 🇧🇦Damir Dzumhur#90Round of 16 · Lost to Fabio Fognini
- 🇷🇸Dusan Lajovic#158Round of 16 · Lost to Dominic Thiem
- 🇮🇹Paolo LorenziRound of 16 · Lost to Philipp Kohlschreiber
- WC🇷🇺Andrey Rublev#23Round of 32 · Lost to Blaz Kavcic
- 🇨🇿Jiri VeselyRound of 32 · Lost to Fabio Fognini
- Q🇷🇸Laslo Djere#133Round of 32 · Lost to Dusan Lajovic
- 🇨🇿Lukas RosolRound of 32 · Lost to Damir Dzumhur
- 🇪🇸Marcel GranollersRound of 32 · Lost to Borna Coric
- WC🇭🇷Mate DelicRound of 32 · Lost to Aljaz Bedene
- Q🇮🇹Matteo TrevisanRound of 32 · Lost to Paolo Lorenzi
- 🇷🇺Mikhail YouzhnyRound of 32 · Lost to Bastian Trinker
- 🇪🇸Pablo Carreno Busta#77Round of 32 · Lost to Martin Klizan
- 🇨🇴Santiago GiraldoRound of 32 · Lost to Philipp Kohlschreiber
- Q🇮🇹Thomas FabbianoRound of 32 · Lost to Andreas Haider Maurer
- WC🇭🇷Toni AndroicRound of 32 · Lost to Joao Sousa