The Croatia Open (currently sponsored by Plava laguna) is a men's ATP tennis tournament held in Umag, Croatia that is part of the 250 series of the ATP Tour.

It began as the Yugoslav Open and has been played every year since.

It is played on outdoor red clay courts.

Carlos Moyá has won the tournament a record five times; he also holds the record for the most consecutive wins at three.

In 2016, the centre court stadium was named after Croatian tennis player Goran Ivanišević.