Eternal derby (Serbia)
The Eternal derby (Serbian: Вечити дерби, romanized: Večiti derbi), also called the Derby of Southeast Europe and Belgrade derby (Београдски дерби, Beogradski derbi), is the local derby in Belgrade, capital of Serbia, between fierce city rivals Red Star Belgrade and Partizan Belgrade, two of the most popular and most successful clubs in Serbia, although the derby has caused division throughout the whole of Serbia. It has been described as "one of European football's most bitter rivalries".