Liverpool boss Jurgen Klopp was full of praise for striker Philippe Coutinho after his side's 1-1 draw at Old Trafford.
The Reds needed to keep their calm after the Red Devils took the lead midway through the first half and it was the 23-year-old Brazilian who scored the vital goal right on half-time.
The quarter final draw is scheduled for today with the German who could end up facing his old club Borussia Dortmund.
"We knew they would show a reaction and it was much more intensive from Manchester United than in the first game," Klopp said.
"We had a little problem in the first half with second balls – they won too many second balls. Usually it's a 50/50 situation, but in the first half I think it was 70/30 for United.
"When we got the ball and used the time we had – because we had a lot more time than we felt in these moments – when we played football and came through it, we had brilliant moments. We created wonderful chances, big chances, but De Gea had another good night in his successful career.
"They got the penalty – I think it was a penalty – then Phil had a genius moment. Wonderful. I loved these two minutes before half-time because twice we reacted quicker than the opponent.
"There was the discussion for the free-kick, Hendo played the ball, had a counter-attack but missed the last pass, like we did in the second half a little bit more often. We had to run back but were again quicker in mind.
"Then Phil used the situation – it was a brilliant moment and decided the game tonight."