The Eternal derby, also called the Derby of Southeast Europe and Belgrade derby, 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".

Fudbalski klub Crvena zvezda, commonly referred to as Crvena zvezda, or simply Zvezda, and as Red Star Belgrade in anglophone media, is a Serbian professional football club based in Belgrade, and a major part of the Red Star multi-sport society.