Pogba joined Juve from Manchester United in the summer.
"His display was pleasing, but I already knew that he had certain skills," Mino Raiola told the Corriere dello Sport.
"I agree with Juventus boss Antonio Conte, to eulogise about him now makes no sense.
"He's shown that he has potential, but he must work, he must strengthen physically and grow by keeping his feet on the ground.
"Then he could become one of the best players in the world in his position. Like all great players, his only limitation is himself.