I'd be suspicious of Ozil aswell, I can see a WWE like scenario where he's about to put the ball in the back of the net, but just turns around, sneers and punts it straight at Ronaldo's head, before taking off his Madrid shirt to reveal a Barca one underneath, and holding up the 5 year Barca contract he secretly signed. Rob Palmer on Skysports, "OH MY GOD, WHAT DOES THIS MEAN?!".
But no seriously, I'd be more worried if I was a Madrid fan about the players mentality, they look great and they have Mourinho as motivator, but they looked damn motivated going into the second clash especially last year and look what happened there. Casillas is probably your most reliable player, Ronaldo has that habit of going missing against Barca, Ozil coudlnt get the ball last time he was up against Xavi, Iniesta and Busquets (with Alonso in there aswell) and Di Maria hasnt played a game anywhere near this magnitude. Likewise Higgy tends to go missing in these fixtures.