The ATP Challenger Antalya (officially until 2018: Antalya Open , since then Turkish Airlines Open Antalya ) is a tennis tournament that has been held annually in Antalya , Turkey , since 2017 . It belongs to the ATP World Tour 250 , the lowest endowed category of the ATP World Tour and is played outdoors on grass. Due to the timing at the end of June and the surface, the tournament is a good preparation for the third Grand Slam tournament of the year at Wimbledon .