Aston Villa boss Dean Smith, speaking to Match of the Day: "Very frustrated, especially with the last 40 minutes. I thought the first half was very even. They scored the first goal and we got worse and they were very good.
Leeds manager Marcelo Bielsa speaking to MOTD: "The start and the end were with City and the end of the first half and the beginning of the second half were a bit better for us
"For them to be superior to us is pretty easy for them, it doesn't require much effort, whereas for us it requires us to go to the limit to be on their level.
Sheffield United manager Chris Wilder told BBC Sport: "They are a decent team, a high energy, high tempo side and I thought we matched that. It's all about creating chances and putting them in the back of the net.
'What a game. What an opponent'
Klopp said he had to catch his breath after a stunning match which was played at a near-empty Anfield because of the coronavirus pandemic.
"What a game, what an opponent, what a performance from both teams.
Derby had a penalty decision controversially overturned as they were defeated 1-0 in their Championship semi-final first-leg clash against Leeds at Pride Park.
Leeds United vs Derby County Highlights
Start date 15.