Liverpool and Manchester City fans were involved in a violent altercation on the London underground ahead of the Community Shield.
Both sets of supporters clashed with punches being exchanged before kick-off on the Metropolitan Line service.
The mass brawl took place when the train was parked on its way to Wembley Stadium.
The disgraceful scenes became the talking point on social media. Here's some reaction from Twitter:
As for the actual game, City beat Liverpool 5-4 on penalties to win the first piece of silverware of the 2019/20 season.
Raheem Sterling opened the scoring in the first-half with Joel Matip heading in Liverpool's equaliser 13 minutes from time.
The Blues would go on to win the Community Shield in a penalty shootout.
"An incredible final. We're exhausted," Pep Guardiola said after the full-time whistle. "They [Liverpool] had chances to win and we had chances to win too - a good test for both teams.
It's nice to play to realise what we're going to face this season.
"We won, last season we won one more point than them. Congratulations to the guys - the first title of the season is ours."