The ex-Liverpool and Bayern Munich midfielder was asked to choose between the two German midfield sensation on Sky 90 - the football debate, to which he said: "For me, Wirtz is in a different league compared to Musiala at the moment. Wirtz makes every player in his team better. I don't think Musiala makes many players better. He makes the team better when what he does works. Compared to Wirtz, he is an individual player.
"For me, Wirtz is currently a potential world footballer in one or two years. Wirtz is always there, always has his head up and always sees the better teammate. Musiala doesn't do that. He has to bring variability into his game because then he's harder to predict. Whether he can learn that is the question. If his dribbling doesn't work, he's not there."