Everything was going very well for Atletico Madrid on Sunday until the 83rd minute. They've been excellent defensively, but have made a couple of errors, and Real Madrid has managed to capitalize on both of them. This one was committed by Mario Suarez, and the man in position to capitalize was Cristiano Ronaldo.
Ronaldo's anticipation and finish were great, but this goal doesn't happen without Suarez's mistake. It was a bad one, and very easily avoidable.