"That kind of performance is just not acceptable for Liverpool Football Club," he said.
"A lot of our fans have paid a lot of money to see that and what they saw just wasn't good enough. We've got to say sorry to them for that.
"People can go on about the first half chances all they like, but that's not enough for us. We've got to perform for 90 minutes.
"There's got to be a big reaction to this now. We've all got to play for the shirt and show how much it means to play for this club.
"It's the players who have to accept responsibility in this situation. We have to take the blame."