"To lose at home is always difficult, especially for us because we're used to winning every game here. We have to sort it out," the Reds keeper told liverpoolfc.tv.
"Everything went wrong. It was disappointing because we never play like this. We were late and almost always behind the ball.
"Last year we were brilliant in the Champions League but started the Premier League poorly. Today it looks like it's the other way round.
"I don't know if we are more focused on the league but we need to learn from these mistakes. We have to talk about it today, analyse and stay calm.
"There is pressure but there's pressure on any game - there's always pressure to win when you wear a Liverpool shirt.
"We have two tough games against Besiktas now and then we host Porto - we have to make sure we do better.
"Now we must think about Tottenham on Sunday. We need three points because we're at home and we will still be confident."