"I am convinced he will not go down as one of the best players of his generation, but as one of the best who has ever lived," says the 28-year-old Cameroonian.
"People will still be talking about him in 50 years, saying, 'I once saw Messi play', and that 'He was the greatest player I have ever seen'. Of that I am sure.
"Some of the things you see him do in training and on the pitch just make you stand back and wonder how it is possible. But he does not conduct himself as if he is the best player in the world.
"He is very humble and just wants to play football, and maybe even he gets a little bit shy when people say such great things about him."