He said on Rio Ferdinand's podcast: "I always try to give him some advice because, on one hand, it’s incredible what he has achieved and what he’s doing, but he also has to realize that soon he’ll face the big challenge of maintaining this level and even going further. And we’re not just talking about the next two or three years—maybe the next ten. About what he needs to do to stay at the top until he’s 28, 29, 30 years old or even longer. That will be the biggest challenge of his career."