Chelsea assistant Steve Holland believes that Manchester United legend Sir Alex Ferguson didn't coach despite being a successful manager.
"With managers they have areas they score very highly on, whether it's man management, tactical, as a coach.
"You can also have examples of course of very successful managers that don't particularly coach. Sir Alex, I think I would be right in saying, that was the case with him."
Holland also believes that Mourinho is exceptional as he can tick so many managerial boxes and feels privileged to work with the Chelsea boss.
He said: "you haven't necessarily got to tick all the of the boxes to be successful, but certainly nobody that I've ever worked with has ticket so many of the fundamentally important boxes (as Mourinho)"
Former Crewe manager Holland was speaking during Chelsea's pre-match press conference for their Premier League clash against Newcastle United on Saturday.
No reason was given as to why Mourinho sent his assistant to carry out the press conference, however it is likely to be linked with his FA sanctioning issued for his comments after his side played Southampton.
Mourinho implicated that referee Anthony Taylor was part of some sort of campaign against the west London side.
The Chelsea boss avoided the pre-game press conference following his charges last year also in an apparent attempt to not get himself in any more trouble with the FA.
Return to Premier League action
Chelsea will be hoping to move free from Manchester City at the top of the table against Newcastle, who ended the Blues' hopes of going all year unbeaten last month with a 2-1 triumph at St James' Park.
Should Mourinho's men drop points then City could capitalise with three points at out of form Everton, who have lost six of the last eight Premier League games.
Chelsea and City are currently joint top with 46 points a piece. Manchester United lead the chasing pack in third place but trail the two table toppers by nine points.