Derby of Serbia (Serbian: Derbi Srbije; Дерби Србије) refers to any match between professional Serbian clubs Red Star Belgrade or Partizan Belgrade from Belgrade and Vojvodina from Novi Sad. A Serbian derby match must involve Vojvodina and either one of the Belgrade clubs; matches between Partizan and Red Star are referred to as the Eternal Derby. One of the main reasons for the rivalry is the fact that Vojvodina, Red Star, and Partizan are the three most successful clubs in Serbia and the three most successful Serbian clubs in former Yugoslavia. Belgrade and Novi Sad are also the two largest cities in the country, so the derby is viewed as a manifestation of the rivalry between the two cities. They were also the only three Serbian clubs to win the Yugoslav championship, and all three club