Chelsea boss Jose Mourinho is delighted for Aitor Karanka over his success at Middlesbrough.
The pair worked together at Real Madrid.
"As an assistant he was humble, honest, loyal and part of my staff with his soul and his heart. I don't know what he's like as a manager but maybe he brought these human qualities with him," Mourinho told The Sun.
'He certainly knows he needs to work hard every day, And especially he knows that in England.
"Whether it's the Premier League or the Championship, the difference between success or not is just a matter of inches."
