Zagreb 2013
Marin Cilic won the title, beating Jurgen Melzer 6–3 6–1 in the final.
Main draw 28 players
- 1🇭🇷Marin Cilic#97Final · Champion
- 3🇷🇺Mikhail YouzhnySemifinals · Lost to Marin Cilic
- 4🇦🇹Jurgen MelzerFinal · Lost to Marin Cilic
- 5🇸🇰Martin KlizanRound of 16 · Lost to Robin Haase
- 6CYPMarcos BaghdatisRound of 16 · Lost to Blaz Kavcic
- 7🇧🇬Grigor Dimitrov#135Round of 32 · Lost to Ivo Karlovic
- 8🇸🇰Lukas LackoRound of 32 · Lost to Flavio Cipolla
- 🇳🇱Robin HaaseSemifinals · Lost to Jurgen Melzer
- 🇸🇮Blaz KavcicQuarterfinals · Lost to Marin Cilic
- 🇭🇷Ivan DodigQuarterfinals · Lost to Mikhail Youzhny
- 🇨🇿Lukas RosolQuarterfinals · Lost to Jurgen Melzer
- Q🇩🇪Philipp PetzschnerQuarterfinals · Lost to Robin Haase
- LL🇭🇷Dino MarcanRound of 16 · Lost to Philipp Petzschner
- 🇮🇹Flavio CipollaRound of 16 · Lost to Lukas Rosol
- 🇸🇮Grega ZemljaRound of 16 · Lost to Marin Cilic
- 🇳🇱Igor SijslingRound of 16 · Lost to Mikhail Youzhny
- 🇭🇷Ivo KarlovicRound of 16 · Lost to Ivan Dodig
- 🇮🇳Somdev DevvarmanRound of 16 · Lost to Jurgen Melzer
- 🇸🇮Aljaz BedeneRound of 32 · Lost to Blaz Kavcic
- WC🇭🇷Antonio VeicRound of 32 · Lost to Robin Haase
- 🇩🇪Benjamin BeckerRound of 32 · Lost to Ivan Dodig
- Q🇭🇷Filip VegerRound of 32 · Lost to Lukas Rosol
- Q🇷🇸Ilija BozoljacRound of 32 · Lost to Grega Zemlja
- WC🇭🇷Mate PavicRound of 32 · Lost to Philipp Petzschner
- LL🇮🇹Matteo ViolaRound of 32 · Lost to Martin Klizan
- Q🇩🇪Michael BerrerRound of 32 · Lost to Somdev Devvarman
- WC🇭🇷Nikola MekticRound of 32 · Lost to Igor Sijsling
- 🇩🇪Tobias KamkeRound of 32 · Lost to Marcos Baghdatis