"We know it will be difficult to play at Old Trafford but we have to try and play as we did on Tuesday night," said the midfielder.
"If we play like this I think we can beat anybody.
"It was a good game for us. From the beginning we were on top of them. The key was to press high - to not let them play. We controlled the game and the result was fantastic.
"It is not easy to beat Real Madrid in the last 16, especially in the way we did it. Liverpool definitely deserve to be in the quarter-finals.
"We are happy and can celebrate - but the next morning you have to start thinking about Manchester United."