The Kozerki Open is a tournament for professional female tennis players.

It is classified as a WTA 125 event since 2023, and was held in Warsaw, Poland in 2024, as the Polish Open.

Prior to 2023, the tournament was a part of ITF Women's World Tennis Tour.

It has been held annually in Grodzisk Mazowiecki, Poland, on outdoor hardcourts since 2019 (until 2024 for the women).

Since 2022, a male version of the tournament is held as part of the ATP Challenger Tour.