Lampard described the £40million sale of the Serbian as “strange” and believes that the Blues ought to have kept hold of the player, given his role in the club’s title-winning season.
“’It was a strange one [to see Matic go to United]. He was such a huge part of Chelsea’s play last year alongside Kante at the base. He let the wing-backs fly on and he allowed Pedro and Willian freedom to go forward,” he told SportsMail.
Lampard also called on the club to strengthen their squad before the transfer window closes.
“You look at the two teams there, and Chelsea have got almost half of what the Arsenal squad is. If we’re talking about quality, I still think Chelsea have that quality, but when Conte was at Juventus he used to do the same thing in the summer. He used to push the club to buy more players to move forward.
“I think he’s concerned as he’s going to lose [Diego] Costa, they’ve lost Matic. They’ve brought players in but I think he wants more because now they’re going to be fighting on the Champions League front,” the former England international added.