Chelsea hero Franck Leboeuf is worried about the form of Kai Havertz.
Lebeouf believes the 21-year-old's display in Tuesday's 2-1 stoppage-time defeat at Wolves sums up boss Frank Lampard's dilemma.
He told ESPN: "Almost invisible. I touched on the point some weeks ago. We heard Frank Lampard say, 'no, we need to give him time'.
"Sometimes it feels like he's not there, that he's not trying to compensate for a lack of confidence with a desire or just being a warrior, showing us that, 'okay, I'm not good at the moment, but I'm going to fight for the club and not be invisible'.
"You can be bad – [Timo] Werner didn't have a good game – but we saw him trying to get something going.
"We don't see Havertz getting anything. I'm very concerned about that guy.
"I don't understand what Havertz is doing right now but I want answers."
