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Bayer Leverkusen star Tella, who previously played for Southampton and Burnley, praised Frimpong's impressive form in the Bundesliga, stating that he "deserves the world" for his performances.
"Jeremie has had many outstanding seasons at Leverkusen, and it was no surprise that a team as big as Liverpool were interested in him," Tella said.
"He is one of those footballers who deserves the world because he's done so much for the team to help us, and he's done so much for himself as a player.
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"If you're good enough, you can play anywhere, and he's shown it's not just that he only plays in Germany, he's played at international level, he's played in the Champions League, and he's done well.
"I wouldn't say there'll be any surprise for anyone to see how good he is there.
He was soon followed by his Leverkusen colleague Florian Wirtz, whose transfer to Anfield was confirmed last Friday.
Frimpong said on joining Liverpool: "I think this is the best stadium I played in when I was with Leverkusen: the atmosphere, the fans, the team as well
For me, playing against Liverpool when I was in Leverkusen, really difficult
Obviously, Leverkusen were still good, but you can see that Liverpool is next level."
Frimpong added: "It went quite easy