If Chelsea make errors they are cooked though. If they keep it tight and don't shit their pants vs Madrid like EPL sides do continously for more than a year... they have a chance. Anything can happen in two games.
I see it as 60-40 for Madrid. Same as Liverpool tie really.
on paper it might be even 70-30 for Madrid or more.
But, in generally, they like Liverpool's playstyle and don't do well against Chelsea's playstyle
in 390' of knock-out football between the two sides the last two years, Madrid were only better for 45' (the first half of the game at Stamford Bridge last season), on par for about 100', and all the rest - that is the majority of the time - Chelsea were simply mauling them
I know, it's a different team, Tuchel who is WC in knockouts is gone. But the mid-block pressing with traps of Potter will be hard for them to work around.
In reality it will be much tighter than on paper