RK Tresnjevka was one of 7 clubs from Croatia that had teams playing during Partille Cup 2018. They participated with two teams in Girls 15 and Girls 16 respectively. The team in Girls 15 made it to the the Semi final in B-Play-off, but lost it against Stockholmspolisens IF by 12-14.
Tresnjevka comes from ZAGREB which lies approximately 1400 km from Göteborg, where Partille Cup takes place. The area around ZAGREB does also provide five additional clubs participating during Partille Cup 2018 (RK Rugvica, RS Zagreb, Rudar, RK Zagreb and RK Maksimir Pastela).