Former Chelsea manager Jose Mourinho believes the side's defensive frailties will eventually get exposed.
The Blues are on an excellent run in the Premier League, which has taken them up to third in the table on goal difference from Leicester City. They are eight points behind Liverpool who are top.
Despite their impressive run, Mourinho has some doubts about the team's defensive solidity under Frank Lampard this season.
"In the first weekend I was worried and I'm still worried with the big matches," the Portuguese coach told Sky Sports.
"I think fantastic work. The kids coming into the team are fitting amazingly well with the top-class players like Willian and Kante.
"I think really, really great work by Frank. But, they lost twice against United, they lost against Liverpool at home. They conceded four goals against Ajax and I'm very, very curious to see Chelsea in the next match at the Etihad.
"I'm curious to see if they found that great empathy between the good football they play and the pragmatism that the top teams must have to play against top teams.
"When they find that I think they have a great team for the future. I don't believe in them to finish top two, but I believe very seriously for them to finish top four."
