Real Madrid sports director Pedja Mijatovic says their defeat to Liverpool was "the worst possible result".
"We still have options regardless that this result is negative. The 0-1 is very complicated, but to win the Champions League, matches are 180 minutes," said Mijatovic.
"We have played a good game. There were two teams very well motivated, both seeking inspiration and they have found something. But we have hope. We are a very powerful team, but this is the worst result we could have.
"We knew we were going to have be very strong because Liverpool is playing very well. We had opportunities, but we have not taken advantage of them and now we must lift ourselves."