The Guinean midfielder has a deal in place which will take him to Anfield when the summer transfer window opens.
A £48 million release clause has been triggered, with several additions on top of that agreement which will push his price tag even higher.
Jurgen Klopp has, however, been informed by a fellow German that he is getting quite the player, with Keita being likened to a World Cup winner who has served Barcelona with distinction for over 15 years.
"I think he's a bit like Andres Iniesta, the same type of player, because he can dribble, shoot and score. He has a lot of qualities that the young Iniesta had."
Liverpool will be hoping to see Keita mature into an Iniesta-esque performer on Merseyside.
He has endured an inconsistent 2017-18 campaign after seeing a big call on his future made back in August.
Werner, though, believes that an exciting talent will be a success wherever he plays, with there plenty of potential within him to still be unlocked.
The Germany international forward added: "I don't think Naby will get worse. He'll only get better. "
Keita has contributed another eight goals and six assists to the Leipzig cause this season, with the club still pushing for a top-four finish in the Bundesliga and continental glory in the Europa League.