He told Sky Sports News: "When a player leaves a club, you do not normally see a manager speak so glowingly about them".
Chelsea manager, Antonio Conte, has once again opened up on the exit of Nemanja Matic, who has signed for their Premier League rivals, Manchester United. As you know the Premier League is the main target.
It's said that chiefs will wait to see how Chelsea fare in their opening games of the season before delving into the market late on for last-minute raids.
"But [Conte] spoke about him in such a way about his incredible importance to the job they did a year ago - 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".
The Belgium worldwide, signed from Everton for a reported initial fee of £75 million last month, netted in the second half of his competitive debut in United's 2-1 UEFA Super Cup loss on Tuesday.
"There is very rarely such big transfers between champions to clubs that are challenging them and it is a odd move".
"Matic has intelligence and experience of the Premier League".
"In every position, we have two very good players, so I am optimistic for this season and let's forget about Madrid". "We want to create a dynasty".
"But we are playing at Old Trafford in front of our fans and we want to win the first game".
"We are ready and West Ham will be ready as well, because they have also played a pre-season and surely they are going to be fit as well", Herrera added.
Chelsea's squad, or whatever's left of it by the time kick-off rolls around in a little over 48 hours, face a theoretically much weaker Burnley side at Stamford Bridge, but if there is one thing that Burnley won't do is make it easy for the boys in brand new Nike blue.
"They are going to be hard to beat".