One manager has released a no holds barred criticism of the Chelsea supremo's management style.
With certain sections of the football community, including his own star man Eden Hazard, levelling some criticism at Chelsea's tactics recently, one of Mourinho's peers has gone one further with a sensational attack on the former Real boss' style.
Hazard's comments appear to have strained his relationship with Mourinho, but the Denmark boss clearly has no such reason for concern.
Olsen has spent 12 years in charge of the Scandinavian country, and before then was the main man at Brondby, FC Koln and then Ajax. It is experience that has led him to adopt a fiercely opinionated view on the Chelsea boss.
“In my world Mourinho is a danger for football," Olsen is quoted as saying in the Mirror. "If many try to copy his style, then the game will die.
“Imagine if everybody played football like Mourinho. Then it would certainly be boring, and then I wouldn’t watch the matches."
The Denmark boss was quick to point out that if he was in charge of the expensively assembled Chelsea squad, the club would be playing a much offensive style.
“I could play so differently with Chelsea, if I got the chance," the 64-year-old reasoned. "But Mourinho is only able to play defensively. The club has spent so much money on so good players. Hell, use them then!
“Of course it is okay to be calculating. Now and then I also like to have the opportunity to play on the counter but there has to be a plan for how you play when you go on the attack. Such a plan has Guardiola. We also have it with the national team but Mourinho hasn’t.
“He solely relies on set pieces, and then he hopes that Hazard or Willian can do something on their own. I certainly understand why Hazard criticized the way Chelsea played after the game.”
Olsen was unable to guide the Danes to the World Cup in Brazil, but has made it to two out of four World Cups in his time in charge and two out of three European Championships.