Everton claimed their first Premier League win at struggling Liverpool since 1999 with a 2-0 victory at Anfield on Saturday.
The win moved seventh-placed Everton, who had not won in 20 attempts in the league against their Merseyside rivals, level with Liverpool on 40 points.
While the victory boosts Everton’s hopes of making a push for a top-four Champions League place, it continues the stunning collapse in form for last season’s champions who have now lost four home matches in a row.
Furthermore, Liverpool have lost five of their eight Premier League matches in 2021, as many as they lost in 72 games in 2019 and 2020 combined.
Brazilian Richarlison put Carlo Ancelotti’s side ahead in the third minute with a cool finish after a delightful through-ball from James Rodriguez.
Liverpool’s injury problems then continued with Jordan Henderson limping off with a groin injury in the 30th minute, forcing Klopp into another reshuffle at the back with Nat Phillips coming on to partner Ozan Kabak.
The outcome was settled when Dominic Calvert-Lewin’s shot was parried by Alisson and the Everton forward went down as he tried to leap over the fallen Trent Alexander-Arnold.
After a review, Gylfi Sigurdsson stroked the penalty into the corner in the 83rd minute.
Of the result, Klopp says: “We stand here having lost 2-0. I know how important it is. We feel it deep inside. But from tomorrow on I have to use all the good stuff.
“These good situations are the guarantee that we can change it but the decisive moments we have to change as well.”
Of Henderson’s groin injury, he adds: “It doesn’t look good...
“It’s a massive blow to lose Henderson. But we’re used to having to change things.
“We will set up again for the next game, as long as we have 11 players we will do that.”