Chelsea and Manchester City fans clashed with police on Thursday night in Porto before the Champions League final on Saturday.
Portuguese authorities have enforced a strict 10.30pm bar curfew to combat the spread of COVID-19 in the country, which was seemingly the cause of the aggravation.
According to The Mirror, the shutting of pubs and bars throughout the city appeared to irk some of the football fans and the curfew came as a shock to many.
One Chelsea fan as left drenched in blood, while some City fans were involved in skirmishes with the police.
Both sets of supporters had mingled happily together throughout the evening chanting, ‘Who the f*** are Man United?’
In a separate incident, City and Chelsea fans clashed in a city centre street as they returned to their hotels following the 10.30pm curfew.
Mobile phone footage posted online showed the supporters fighting, before police stepped in to break it up.
The Blues won the competition back in 2012 thanks to the heroics of Didier Droga, while it is the first time City have ever reached the final of a major European competition.
And the fans are focusing on the positives rather than the off-field trouble in the build-up to Saturday’s showpiece.
“When we won the League Cup in 1976 and were runners-up to Liverpool by one point in 1977, I thought football was only going to get better and better,” said Kevin Parker, 60, general secretary of City’s Official Supporters Club and a season-ticket holder since 1973.
“The reality was it didn’t. It just got worse! But I have been on that journey and it’s been great.
“I wouldn’t have changed that ride. I wouldn’t swap any of those 35 years when we didn’t win a trophy for anybody else’s success because it was great. It was a fantastic journey.
“I don’t still want to be on it – to be fair – but we’ve had the best of both worlds.”