Liverpool's 2-0 Premier League defeat by Hull City was "not acceptable", said manager Jurgen Klopp.
Alfred N'Diaye scored on his Tigers debut and loanee Oumar Niasse added the second as the Reds lost for the fourth time in their past five matches.
Klopp's men remain fourth, though they could slip to fifth on Sunday, but are yet to win a league match in 2017.
"The overall performance was not like it should be. It makes no sense for us to play like this," said Klopp.
"If we played like we did in the second half for the whole game, no team can cope with us.