The greatest rival or Arka is Lechia Gdańsk, a team with whom they contest the so-called Tricity Derby or Pomeranian Derby. Fans of both teams remain venomously hostile and since the early 1970s the history of games between Arka and Lechia is marked by riots and violence. Relations with another Gdynia football team Bałtyk Gdynia used to be friendly until the 1980s, when they turned hostile. Due to Bałtyk's successive relegations and their declining numbers of fans this rivalry is now of lesser importance.