Sid Lowe, for The Guardian:
At the final whistle Cristiano Ronaldo, scorer of two goals, departed shaking his head. It had been a crazy game. It was not supposed to be this way; it was supposed to be easy. Madrid had won 2-0 in Germany and their opponents had not impressed. The idea they might be beaten was never entertained, still less the idea they might be eliminated. The former happened, the latter almost did. Schalke were superb, tearing into Madrid, terrifying them.
I was there, on a break during a business trip, and this was a fantastic game to watch. At the end, the Madrid fans whistled and booed their own team relentlessly. However, when the Schalke players came over to clap their incredible supporters — they sang and clapped, pounded and screamed and were fantastic throughout the match — the whole of the stadium stood up to applaud the efforts of the Germans. Good form.