Ray Wilkins claims Chelsea may have handed the Premier League title to Manchester United by selling them Nemanja Matic.
The Serbian midfielder was named man of the match on his Premier League debut for United on Sunday in the 4-0 victory over West Ham.
Wilkins spoke of his amazement that Matic was allowed to move to Old Trafford by Chelsea chiefs in a £40million deal.
And he warned the decision could prove a costly one for the 2016/17 champions, who suffered a shock defeat to Burnley on the opening day of the new season.
“What an amazing impact that was yesterday from Nemanja Matic,” He said.
“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 £40million because it certainly wasn’t Antonio Conte’s.
“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.”