Croatia Open Umag 2011
Alexandr Dolgopolov won the title, beating Marin Cilic 6–4 3–6 6–3 in the final.
Main draw 28 players
- 1🇦🇷Juan Ignacio ChelaRound of 16 · Lost to Potito Starace
- 2🇺🇦Alexandr DolgopolovFinal · Champion
- 3🇭🇷Ivan LjubicicRound of 16 · Lost to Juan Carlos Ferrero
- 4🇭🇷Marin Cilic#96Final · Lost to Alexandr Dolgopolov
- 5🇪🇸Tommy RobredoRound of 16 · Lost to Carlos Berlocq
- 6🇮🇹Fabio FogniniSemifinals · Lost to Marin Cilic
- 7🇮🇹Andreas SeppiQuarterfinals · Lost to Marin Cilic
- 8🇭🇷Ivan DodigRound of 32 · Lost to Albert Ramos
- 🇪🇸Juan Carlos FerreroSemifinals · Lost to Alexandr Dolgopolov
- 🇪🇸Albert RamosQuarterfinals · Lost to Alexandr Dolgopolov
- 🇦🇷Carlos BerlocqQuarterfinals · Lost to Juan Carlos Ferrero
- 🇮🇹Potito StaraceQuarterfinals · Lost to Fabio Fognini
- 🇦🇷Diego JunqueiraRound of 16 · Lost to Andreas Seppi
- 🇮🇹Filippo VolandriRound of 16 · Lost to Alexandr Dolgopolov
- Q🇮🇹Gianluca NasoRound of 16 · Lost to Albert Ramos
- 🇧🇪Olivier RochusRound of 16 · Lost to Fabio Fognini
- 🇳🇱Robin HaaseRound of 16 · Lost to Marin Cilic
- WC🇭🇷Antonio VeicRound of 32 · Lost to Diego Junqueira
- 🇸🇮Blaz KavcicRound of 32 · Lost to Carlos Berlocq
- Q🇷🇸Dusan Lajovic#163Round of 32 · Lost to Andreas Seppi
- WC🇭🇷Mate DelicRound of 32 · Lost to Gianluca Naso
- WC🇭🇷Mate PavicRound of 32 · Lost to Filippo Volandri
- 🇦🇷Maximo GonzalezRound of 32 · Lost to Juan Carlos Ferrero
- Q🇪🇸Ruben Ramirez HidalgoRound of 32 · Lost to Tommy Robredo
- 🇵🇹Rui MachadoRound of 32 · Lost to Fabio Fognini
- 🇺🇦Sergiy StakhovskyRound of 32 · Lost to Olivier Rochus
- Q🇮🇹Simone VagnozziRound of 32 · Lost to Robin Haase
- 🇳🇱Thiemo De BakkerRound of 32 · Lost to Potito Starace