Real will come in overconfident and blow it. I just know it since a friend talked me into placing a bet on them, "easy money"... yea. Probably a good idea to place a small bet on Juve and break even whatever happens.
Juve will park the bus in front of their goal line and Real will just fail attack after an attack. Juventus will only have 2-3 dangerous counter attacks but they'll score with one of them, probably towards the end of the match when everybody are expecting an overtime. Lack of time and frustration with 80 minutes of fruitless attempts to score will break Real completely and this will end 1 - 0 for Juve in a boring one sided match where the biggest losers will be the fans and viewers.