Chelsea hero Frank Leboeuf has concerns about Frank Lampard's side.

The Blues conceded three goals once again in Saturday's 3-3 draw with Southampton at Stamford Bridge.

But the defence isn't the only area of concern for former Blues defender Leboeuf.

"I'm not convinced about Havertz, I'm not that optimistic," Leboeuf told ESPN. "I'm very pleased with Werner, he's a real satisfaction.

"Thiago Silva should have been back because it's crucial for Chelsea to have a real leader at the back and that's the main problem.

"They all have to work hard physically to make sure they can play together and be stronger together.

"I'm not convinced at all about Chelsea right now. It's like they don't know each other, they're not fit enough, I'm very worried.

"I'm going to give them the benefit of the doubt because I don't know what they're worth, but, really, if they keep on performing like that, for sure they're not going to finish in the top four."