They have absolutely unbelievable talent in their side but I confidently say they are about 3/4 of the side they were when they won the UCL against Juve 2 years ago
I watched their game against Atleti last month and they literally were stumped as to how to break them down. They scored from a scramble after a corner and after that, Madrid were the better side. Don't get me wrong, we will not play like Atleti (who sat behind the ball for the entire game and hit on the break), but it showed a way of stopping them
I also saw them (Minus just Messi - just!) obliterated by Celta in the first half where they went 3-0 down. They are not the side they were simply because of age any maybe motivation but they've also lost to Alaves this year and struggled against the Borussia side we battered
I dont THINK we will win, but I am more confident than on any of the trips we have had to Spain so far. I dont see us going 4 games without a big, clinical performance, so I wouldn't be surprised if we pulled it out and beat them.
Bare in mind we were outstanding at Old Trafford, a huge pitch, and this one is probably the biggest in Europe besides Wembley and I can see us taking advantage and breaking with our build up pretty easily against their midfield, its whether we can put the chances away that we havent in the past couple of games