That’s the view of Red Devils hero Gary Neville.
Matic, 29, joined United in a £40m deal last month, with the Serbia international keen to reunite with Jose Mourinho at Old Trafford.
Conte has been asked about the midfielder’s move, with the Chelsea boss saying Matic is a great loss for the Premier League champions.
And Neville reckons the Blues chief is furious about losing Matic this summer, claiming Conte is uncomfortable with the deal.
"When a player leaves a club, you do not normally see a manager speak so glowingly about them," Neville told Sky Sports.
"Usually they would say it is time for them to leave, it was the right move for both parties.
"But he [Antonio Conte] spoke about him in such a way about his incredible importance to the job they did last year, Matic and N'Golo Kante in front of that back three.
"And I have no doubt that he has not sanctioned that move, he is not happy with it and ultimately he is uncomfortable with it.
"I have to say that it is a strange move, it really is, to sell to one of your main rivals.
"Sometimes transfers can get forced through, but it did not seem to me that Matic was forcing it through. Maybe he was behind the scenes, but it did not seem he was publicly.
"There is very rarely such big transfers between champions to clubs that are challenging them and it is a strange move.
"And I do not think he likes it and I do not think he agrees with it because he said he has to strengthen now and fill that gap."
