I honestly can't see crowds being let back in this year, even at reduced capacity. How do you deal with localised lockdowns? What if the city isn't in lockdown but the R is on the rise? Even if fans are allowed back in it's pretty certain that away fans won't be allowed to prevent cross contamination between cities, especially if its a club from up north coming down south. I doubt even Euro 2021 will be played in front of fans. If it stays like it is now there's no chance they want people travelling all across Europe just for Football.