Jurgen Klopp conceded he is getting sick of Liverpool's defensive miscues after they slumped to a 2-0 defeat at Leicester City in the League Cup third round.
Klopp's side crashed out as careless play allowed Shinji Okazaki and Islam Slimani to score for Leicester in the second half at the King Power Stadium on Tuesday.
Liverpool have kept just two clean sheets this season and have been criticised for letting teams off the hook.
Manager Klopp said he is now becoming fed up of the sloppy performances which have left his side without a win in four matches.
Jürgen Klopp reacts to tonight's defeat at Leicester: https://t.co/J7WOkzo9db pic.twitter.com/R2LJvEWkuj
— Liverpool FC (@LFC) September 19, 2017
"After the first goal you saw the heads from Leicester went up, that was a bigger difference," Klopp said.
"The game changes in moments like this, you have the chance to do it by yourself or sometimes you are on the wrong side and that's how it is.
"But that we concede like this, that makes me really, really sick.
"We are still a good football team, I see it, but unfortunately it doesn't feel [like that] at the moment because it's a cup competition.
"We wanted to go into the next round and nobody is interested who plays the better in the first half.
"The story of this game is really easy to tell, we were the much better team in the first half, we played good football, we didn't score, that's sometimes part of football.
"But as long as we concede goals like we conceded today, then it is quite difficult."
Defeat came after the visitors dominated the first half as Coutinho, Alex Oxlade-Chamberlain and Dominic Solanke missed fine chances.
68: Oxlade-Chamberlain turns and shoots under pressure but his effort soars just over.
— Liverpool FC (@LFC) September 19, 2017
[1-0] #LFC pic.twitter.com/zgoOoP8hoe
Coutinho was withdrawn at the break as he builds fitness after an interrupted opening to the season, where Liverpool rejected several bids from Barcelona.
It upset Liverpool's momentum but Klopp insisted the Brazil international was always down to come off.
"That was the plan before the game. He needs match time but it was not the plan to let him play again 60 or 70 or 80 minutes," Klopp said. "Forty five is the limit. We need to get him fit but we cannot push him through."
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Liverpool return to the King Power Stadium in the Premier League on Saturday and Klopp said he will forget about Tuesday's defeat.
"I lost more games in my life and in the morning I am fine but yes, we will come back, and I will be in better shape," he said.
Leicester manager Craig Shakespeare added: "I was delighted to get in at half time and then delighted to see Coutinho had gone off which was one of the main contributions to us."
