Chelsea have picked up 15 points from their opening eight Premier League games and are just three points behind leaders Leicester City.
Chelsea struggled defensively last season but the Blues have looked more solid at the back this season thanks to the arrivals of Edouard Mendy and Thiago Silva.
According to Ian Darke, Chelsea can win the Premier League title this season if Thiago Silva stays fit.
“I think they’re strong dark horses the way things are shaping,” Darke told ESPN FC.
“The big question was could they mend their leaky defence?
“It looks like they can, because Mendy’s looked solid since he’s come into play in goal and Thiago Silva’s a terrific leader and all class at the back.
“So I think if they can keep Thiago Silva fit, with the attacking talent they’ve got as well, they’ve got as good a chance as anybody.”