Barcelona have taken PSG to UEFA over a pre-match tifo they say crossed the line into inciting violence and hatred in sport.
The Champions League drama started before a ball was kicked. Barcelona have filed a formal complaint with UEFA against Paris Saint-Germain after a tifo displayed ahead of Tuesday's clash carried a message the Catalan giants say has no place in football.
In their complaint, Barcelona argue the banner "incites violence and hatred in sport". It is a strong accusation, and one that puts the spotlight on the fan display rather than the football.
The matter now sits with UEFA's disciplinary bodies, who will decide whether to open proceedings. Cases involving fan banners and choreographies can lead to fines, stadium restrictions or other sanctions if a charge is upheld, though nothing has been decided yet.
Tifos are a proud part of European football's big nights, with supporters pouring huge creativity into them. Barcelona's complaint shows how quickly those displays can become a flashpoint when a message is seen as crossing the line. All eyes now turn to UEFA to see how it responds.
