That's the verdict of German journalist Ronald Tenbusch, who covers the midfielder's current side, RB Leipzig, for Die Welt.
Keita was heavily linked with a move to Anfield this summer but Liverpool were forced to settle for a deal which will see him join them next year.
In the meantime the Guinea international has looked to build on the impressive performances that marked him out as one of the Bundesliga's top prospects last season.
Keita has had more than his fair share of disciplinary issues this term though and has been sent off three times for club and country.
However, Tenbusch doesn't think those problems should worry Liverpool ahead of his arrival on Merseyside.
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I don't think he has problems with discipline
Ronald Tenbusch on Naby Keita
"I don't think he has problems with discipline," Tenbusch told Sky Sports.
"The only thing I have recognised is that he has changed his style a bit, he is wearing more extravagant clothes, but he is certainly not a diva.
"Of course he needs to learn how to handle aggressive opponents but I don't think he has a problem controlling his emotions.
"He is not like Franck Ribery, who reacts with physical assaults when someone provokes him. From my point of view, Naby just needs to find the right balance in his style of play."
Tenbusch also discussed why Keita has taken on a more combative role this term.
Liverpool-bound Naby Keita has been sent off three times for RB Leipzig and Guinea this season
RB Leipzig midfielder Naby Keita was tracked by Liverpool boss Jurgen Klopp over the summer
"He is involved in more duels than last season," he added.
"So on one hand, opponents are more aggressive towards him.
"But on the other, his game has changed. Why? Because RB is pressing a little bit less this season, so Naby has to compete in more duels to win possession in midfield."
Tenbusch believes Keita is getting back to his best though, having initially failed to hit the heights of last season this term.
"He is looking more and more like the dominant central midfielder we used to know," he said.