“Obviously you look on paper at his CV, at the clubs he’s been at, and it’s
unbelievable,” Johnson told talkSPORT.
“You don’t get to those clubs without an enormous amount of ability.
“He’s not reached the heights he’s capable of since he’s left Liverpool and it’s hard to put your finger on why. I know he’s a quiet guy, a very nice lad, but he’s got a bit of fight about him on the pitch, he won't be pushed around.
“At Barca you go there and there’s a superstar in every corner you look, and maybe he just blended in a little bit rather than being the key man. I just think he needs to be made to feel a bit special; he needs an arm around him, and I think he’d get that at Chelsea.”
Johnson added: “I think he’s just a bit cautious when he meets new people and it takes him a bit of time to come out of his shell. That’s why I guess when he walks into a new dressing room it will take a bit of time for the lads to get to know him, but he’s a really nice lad.
“I think it would be great for him and his family to be in London and Lamps could be the man that puts his arm around him and makes him feel he is a key part of their plans, and I think that could force the best out of him.