The Reds signed the Guinea international in a £48m deal from Bundesliga side RB Leipzig in the 2018 summer transfer window to bolster their midfield options.
Liverpool FC agreed a fee with RB Leipzig in 2017 to beat other suitors to his signature but the African star remained at the German club until the end of 2017-18 season.
Keita made his Liverpool FC debut in a 4-0 victory over West Ham United in their opening Premier League fixture and impressed with his creativity in midfield.
The Guinea star started Liverpool FC’s first four Premier League games but Keita has struggled with injuries over the past couple of months to limit his impact.
Keita has made a further five appearances from the bench but the summer signing has failed to score a goal or make an assist in the Premier League this term.
Speaking at his pre-match media conference ahead of Liverpool FC’s Champions League clash against Paris Saint-Germain, Klopp issued his backing for Keita.
“Naby Keita will be – and he is – an outstanding player. I don’t read the English press, but this week I caught a headline of something and I didn’t say it like this or mean it like that – Naby was not average since he came in,” Klopp said.
“The situation after he got injured was average because he has to get fit again, but the start was brilliant. He will be a massive player in the future for LFC and he is already.
“He is now really fit, he looks sharp in training, but as it is at a club like ours sometimes you have to wait a bit longer for the moment. And when you get the moment, then you have to be ready. That’s how it is. He is an outstanding player and we are happy to have him.”
Liverpool FC were 3-0 winners against Watford at Vicarage Road last weekend to remain two points behind club leaders Manchester City.
The Reds will face a tough assignment against bitter rivals Everton in Sunday’s Merseyside derby at Anfield.
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