The Kozerki Open is a tournament for professional female tennis players. The event is classified as a WTA 125 event since 2023, and was held in Warsaw, Poland in 2024. 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. Since 2022, a male version of the tournament was held as part of the ATP Challenger Tour.