
Sir Alex Ferguson once left a Manchester United star crying in his room after making a ruthless decision.
Ferguson, 83, enjoyed a stellar career managing United from 1986 to 2013.
During his time in charge at Old Trafford, Ferguson led United to 13 Premier League titles and two Champions Leagues, among other trophies.
Since the Scotsman retired back in 2013, United have failed to win the Premier League and are currently struggling to keep up with the likes of Manchester City, Liverpool and Arsenal.
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During his tenure as manager, Ferguson worked with some of the club's greatest players, including Wayne Rooney, Cristiano Ronaldo, Roy Keane, and Paul Scholes.
In the book 'Bring on United' by Andy Mitten, former United star Patrice Evra revealed that Ferguson made Ji Sung Park cry in his room after leaving him out of the squad for the 2008 Champions League final.
Evra said: "I learned a lot from Ji about humility and respect, which is important in Korean culture. I went to see Ji in the hotel after training the day before the game.
"He said: "Don't worry, Patrice, just focus on the final and win for United." But I knew he was hurting, and he told me later that he was hurting a lot and had cried alone in his room. I'd never seen him show his emotions before."
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The Frenchman continued: "Ji was right to be disappointed, especially as he'd been one of our best players in the semi-final against Barcelona, both home and away.
"Even Xavi Hernández later said: "Wow, that Korean never stopped running." He didn't. Louis Saha also didn't make the team. He cried too, but we had to focus on the game."

Park himself stated that the omission in 2008 was one of his saddest moments as a United player.
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He said: "We won the Premier League many times and reached many finals, and it was in Moscow that I had one of my saddest moments when I found out I wasn't in the squad for the Champions League final against Chelsea.
"Everyone was great, but I still remember Patrice (Evra) and Carlos (Tevez) in particular, they definitely gave me comfort. I was sad, obviously, but they just hugged me, then I could read their faces how they felt disappointed for me and how sad they felt. They wanted to share the occasion with me, with their friend, so I felt really appreciated by their behaviour and their expressions on their faces."
United went on to beat Chelsea in the final via a tense penalty shootout, with Edwin van der Sar saving the vital kick from Nicolas Anelka to seal the victory.
Topics: Sir Alex Ferguson, Patrice Evra, Manchester United, Football