The I.ČLTK Prague Open is a tennis tournament held in Prague, the capital of the Czech Republic.

The tournament has been part of the ATP Challenger Tour since 1991[1] (with an interruption in the years 2000,[2] 2009–10) and part of the ITF Women's World Tennis Tour since 1995.

Starting in 2015, a women's tournament was held in addition to the men's tournament and was part of the ITF Women's Circuit.

Jan Hernych is the singles record holder with three titles.

Michal Tabara, Lukáš Rosol and Horacio Zeballos are the only three to win both singles and doubles in the same year.