Nemanja Matic had an impressive debut for Manchester United

The Blues sold Nemanja Matic to the Red Devils for £40m earlier this summer.

He got off to a blistering start with a classy performance in United's 4-0 demolition of West Ham at the weekend.

Chelsea, on the other hand, suffered a shock 3-2 defeat to Burnley and their squad looks paper thin.

And former Blues player and coach Wilkins is not optimistic about their chances this season following Matic's departure.

He told talkSPORT: "What an amazing impact that was yesterday from Nemanja Matic.

"I am a Chelsea supporter, I buy my season tickets at Chelsea, and I want to know whose educated decision that was to sell Nemanja Matic to Manchester United for £40m because it certainly wasn’t Antonio Conte's.

Ray Wilkins thinks Chelsea have made a big error

"As a Chelsea supporter, I want to know who made that decision.

"After winning the league with such a devastating midfield duo of [N'Golo] Kante and Nemanja Matic, why are selling one of them?

"Yesterday you saw what Matic can do.

"It could cost Chelsea the league and give the Reds the league."