The 2010 Studena Croatia Open Umag was a tennis tournament played on outdoor clay courts. It was the 21st edition of the Croatia Open Umag, and was part of the ATP World Tour 250 Series of the 2010 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from July 26 through August 1, 2010.

ATP entrants

Seeds

*Seedings based on the July 19, 2010 rankings.

Other entrants

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw:

Finals

Singles

🇪🇸 Juan Carlos Ferrero defeated 🇮🇹 Potito Starace, 6–4, 6–4

Doubles

🇨🇿 Leoš Friedl / 🇸🇰 Filip Polášek defeated 🇨🇿 František Čermák / 🇸🇰 Michal Mertiňák, 6–3, 7–6(9–7)