Hey guys,

I will be in Barcelona from 29. March to 4.April... I am attendding Barca vs Athletico which will be played on Saturday or Sunday ...
At this point I have a little problem: I recently read that the return leg of the UCL quater finals are to be played on the 3rd and 4th of April. I would really like to attend it as well ( if Barca progresses and the game is played in Barcelona).
I am not so firm about the rules in CL. I know that the winner of the group plays at home in the return leg.. but what if Barca meets another winner of their group in the quarter finals ( Real, Bayern, ... ) - who decides where the match will take place first??