Chelsea hero Glenn Hoddle insists Romelu Lukaku can only snap his slump if he's honest with himself.
He initially hit the ground running, scoring four goals in his first four appearances under Thomas Tuchel.
However, his performances since then have plateaued and Hoddle thinks it could be down to the striker's fitness.
He told the Daily Mail: "The missing piece is nothing to do with Tuchel, it's nothing to do with how Chelsea play. He's got to look himself in the mirror.
"He's got to look himself in the mirror and say I've got to get the best out of myself. He is no way near the player he was since he had that interview. Since he had that injury.
"I don't know if he is fit enough. He doesn't look really lean and fit to me. Maybe he's worked on the wrong things. He may have worked hard but he may have worked on the wrong things.
"He might have done too much gym work for instance, but I don't know. I am not privy to that.
"He comes on [to the pitch] and he doesn't look like a player that is going affect the game to me.
"Your substitutes, when you put them on, you want them to affect the game. You want them to have an impact on the game in a positive way.
"He doesn't quite look that way at the moment. He's a bit like, if the ball comes or if someone puts it on my head or if someone gives me a chance I'll score.
"But he is not working hard enough to create space or get on the end of things. He's got to look at himself in the mirror."
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