As one of the world's best football players, Cristiano Ronaldo has naturally had the chance to work with some of the biggest names in management throughout an illustrious career.
Since joining Real Madrid in 2009, Ronaldo has played under Manuel Pellegrini, Jose Mourinho, Carlo Ancelotti and Rafa Benitez. All huge names but none compare, to the man who originally plucked him from obscurity and helped him onto the world stage.
Ronaldo's relationship with Sir Alex Ferguson has been well documented. The Scottish manager brought him to Manchester United from Sporting Lisbon and instilled tremendous faith into him.
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As a cocky 18-year-old with a slender frame, Ronaldo seemed to embody everything that a Premier League player shouldn't. But Ferguson saw something many others did not; a potential global star.
And, speaking to ITV chatshow host Jonathan Ross, Ronaldo admitted it was Ferguson's ability to man-manage that places him above the likes of Mourinho.
"I just have to say thank you for what [Ferguson] did for me," the Portugal international said in the interview.
"We had an important game in the Champions League and I said, 'Coach I need to go to see my daddy' and I was a key player, I was a very important player and he said, 'Listen, your personal life, your family is the important thing that you have in your life. If you want to go three days, four days, five days you can go'.
"This moment is what I keep for me because it was the most important time in my life and he shared it with me. This is why I respect him and for me he's the best coach I ever had."
Ronaldo returns to Old Trafford this weekend to take part in David Beckham's UNICEF charity match, but, appearing for the World XI, will be working under Ancelotti with Ferguson on the opposing bench.
But Ferguson remains an influential figure at Manchester United, taking a non-executive director role when he retired in 2013 and the Sun have recently claimed that he could be used to try and bring the three-time Ballon d'Or winner back to the club next summer.