The 2008 Croatia Open Umag was a tennis tournament played on outdoor clay courts. It was the 19th edition of the Croatia Open Umag, and was part of the International Series of the 2008 ATP Tour. It took place at the International Tennis Center in Umag, Croatia, from July 14 through July 20, 2008.
The singles field was led by Nottingham runner-up and recent Båstad semifinalist Fernando Verdasco, two-time Nottingham champion Ivo Karlović, and Costa do Sauípe runner-up and five-time Umag winner, defending champion Carlos Moyá. Other seeded players were Gstaad finalist Igor Andreev, Zagreb runner-up Ivan Ljubičić, Guillermo Cañas, Fabio Fognini and Marcos Daniel.
Fernando Verdasco defeated Igor Andreev, 3–6, 6–4, 7–6(7–4)
- It was Fernando Verdasco's 1st title of the year, and his 2nd overall.
Michal Mertiňák / Petr Pála defeated Carlos Berlocq / Fabio Fognini, 2–6, 6–3, [10–5]