I’m pretty confident KC would become the first team with negative home court advantage, whoever they play against is gonna get actively cheered for and they’re gonna get booed hard
IF KC makes an international event that's hosted in EU you can bet your house that the venue will be packed with KC fans so unless they can't get their hands on tickets so it will be filled with KC fans not Spanish fans and even then I fully believe the Spanish fans will cheer for KC over a team from NA or Asia but probably not SA.