Speaking to Sky Sports, Vermaelen said: "Oh, it's definitely a level he can still perform at. I know him very well. I played lots of games with him. I know the quality he has. I mean, you see it on the pitch. You don't have to play with him to know the world-class qualities he has. So, he definitely has that still in him to play in the Premier League. I mean, now I'm a fan and I'm looking from the outside. So then I would think, yeah, I know what he can do.
"I know how he's still performing. So then you think, well, that's a bit of a strange decision. Well, one of the best players I ever played with. And I played with [Lionel] Messi, Eden Hazard, but they're all different players to Kevin. Kevin is a Premier League legend. The passes he does, the vision he has in certain moments in a game, he can see a picture we don't see and he can actually execute at such a high level."