The Zagreb Indoors (currently sponsored by PBZ) is a tennis event on the ATP Tour held in the Croatian capital of Zagreb. From 2009, it is part of the ATP 250 Series and offered 250 ranking points. The tournament is played on a fast and hard indoor surface (RuKort) and features both a men's singles and a men's doubles tournament.
The Zagreb Indoors was held for the first time in nine years in 2006. The tournament was an ATP International Series tournament from 2006 to 2008. Previously it had been an ATP World Series event from 1996 to 1997.