Dejan Lovren insists Liverpool need a change in mentality and must “fight more” after the Reds were beaten 2-0 at West Ham on Saturday.
Michail Antonio headed West Ham in front after only 10 minutes before Andy Carroll – Liverpool’s record signing – sealed the victory with a second-half header.
After the defeat, Liverpool boss Jurgen Klopp admitted he was “really angry” and defender Lovren says the players need to feel the same.
“We are disappointed. It wasn’t the best performance from us and we need to be angry with ourselves,” he told the club’s official website.
“We could and we need to do more because when you look to the two [previous] games, today it was something different.
“I don’t know the reasons why but we need to step up quickly from this because we don’t have time to think about it now, because we have the game with Stoke on Tuesday.
“We definitely need to change our mentality and we need to keep a better run of games and to fight more. It was two easy goals [conceded], I would say.
“We left them space to cross early and then it’s difficult [to defend] for Clyney and Alberto because Carroll is 6ft5, so it’s easier for him. We need to step up and forget this as soon as possible.”
Liverpool travel to Stoke City on Tuesday for the first leg of the League Cup semi-final.
And Lovren says the Reds need to move on quickly from the defeat at Upton Park if they are to win their first silverware since winning the same competition in 2012.
“We have a game in the cup against Stoke and it’s a big chance for us to get to the final,” he added.
“So we need to stay calm and say tomorrow is a new day and we’ll start to prepare for the Stoke game and try to be in the final.”