The Kozerki Open is a tournament for professional female tennis players. The event is classified as a
WTA 125
WTA 125 tournaments are an international series of professional women's tennis tournaments organized by the Women's Tennis Association since 2012.
In the past (2012–2015) sometimes called the WTA Challenger seriesITF Women's World Tennis Tour. It has been held annually in Grodzisk Mazowiecki, Poland, on outdoor hardcourts since 2019. In 2022, a male version of the tournament was held as part of the ATP Challenger Tour.