Chelsea legend Frank Leboeuf insists he unconvinced by new Chelsea signing Kai Havertz.

Havertz scored his first Premier League goal in the 3-3 draw against Southampton on Saturday but was also at fault for Southampton’s first goal as was dispossessed in a dangerous area.

“I’m not convinced about Havertz, I’m not that optimistic,” Leboeuf told ESPN FC.

“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.”