Like in muggle sports there are rivalries between two teams, most of the times due to historic reasons or sometimes given rise by fans or media. Do such rivalries exist in quidditch?
For example, in cricket India vs. Pakistan is considered match with intense rivalry due to ongoing border conflicts since 1947. In football, at club level, Real Madrid vs. Barcelona is one such rivalry. In such rivalries, players, fans and media from both sides will be at intense level of craziness as well as dedication.
Sometimes, there is no rivalry between 2 teams, but due to certain event, match between those two teams are termed important.
For example, in cricket, Australia once scored 435 runs in 1st inning. This was 1st time in history that some team had scored such high runs (world record at that time) in One Day International match. Everyone considered this one sided match as South Africa though good team would succumb to Australian bowling. But South African team actually chased that high score and again broke the record by scoring 438 to defeat Australia. Since then, cricket match between Australia and South Africa has achieved a different status, though not rivalry.
Gryffindor vs. Slytherin is at school level, is there any mention of such rivalry at international level?