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Cristiano Ronaldo and Jose Mourinho are two very big personalities.
And in 2013, while the pair were working together at Real Madrid, they came to blows in the dressing room following a win over Valencia.
Guillem Balague's book Cristiano Ronaldo: The Biography, recalls the incident, which stemmed from Ronaldo taking a throw-in hurriedly so Mesut Ozil was unable to control it 10 minutes before the end of the game.
Mourinho reprimanded Ronaldo from the touchline, before bringing up the issue – and general thoughts he had – to his compatriot in the changing room after the match.
Ronaldo, though, wasn't in the mood for his manager's comments.
And the Portuguese hit out at Mourinho, saying: "After everything I've done for you, this is how you treat me? How dare you say that to me!"
Cristiano Ronaldo and Jose Mourinho are two very big personalities
(Image: Getty Images)
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The dressing room fell silently, prompting Mourinho to respond: "I was saying it for the team, because the team needed you to track back."
But this only irritated Ronaldo more, with the book explaining: "As [Mourinho] could see Cristiano had no intention of calming down, he gradually retreated.
"Soon after, he approached the forward again to resume the conversation with less tension. But Ronaldo fired back angrily.
"Mourinho was unable to contain himself any longer."
Mourinho and Ronaldo came to blows at Real Madrid
(Image: AFP/Getty Images)
The now Tottenham boss hit out at Ronaldo, in front of his team-mates: "'Just so you know,' he shouted for everybody to hear, 'Many think like me here, but don't dare say it, they don't have the balls to tell you.'"
The situation is said to have got so heated that Ronaldo had to be held back by his team-mates to ensure the pair didn't come to physical blows.
Balague explains that Mourinho had been asked by a number of Real Madrid stars in the days leading up to the argument to instruct Ronaldo to defend more.
Ronaldo's relationship with his Portuguese compatriot was never the same again
Balague concludes: "Ronaldo took what should have been understood as a tactical comment as a personal attack. The relationship between Mourinho and Ronaldo would never be the same again."
Mourinho would leave Real Madrid at the end of the season, just a few months after the incident with Ronaldo.
Will Cristiano Ronaldo leave Juventus in the summer? Have your say here.
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