This is what you get when fans that are so much obsess with their team came face to face with an opposing fans that are of the same sentiment and behavior.
And it was a good thing that the authorities were present to stop them, if not their would have been casualties from both sides or one side, so it's a good one for the police to be there at the right time to stop this madness.

Then as for the game today, though it's an European football final and everyone expected it to be interesting and fascinating, but I see this trophy easily coming to England, no disrespect to real betis but they are not on the same league as Chelsea, and in my own opinion they are clearly the underdog here.
Let's not forget that Chelsea is one buggy team that knows how to beat Spanish teams more than every other English team, so on that note, I believe that they will be too strong for real betis, even though they aren't in their best of form for now.