Roy Keane has opened up on the one club he wished he had signed for during his career in his autobiography after rejecting a move whilst sitting on the toilet.
Keane made 326 appearances for Manchester United before making the move to Celtic in 2005, where he retired just a year later.
However, Celtic weren't the only club after Keane in 2005 with the former Ireland international turning down to chance to move to Spanish giants Real Madrid.
In his explosive autobiography, Keane reveals that Ex-Real Madrid sporting director Emilio Butragueno rang the former United skipper in 2005 whilst he was on the toilet.
Keane wrote via The Daily Mail: "Michael had given me a heads-up that Emilio Butragueno would be phoning, so I took my mobile phone everywhere with me.
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"And - how's your luck - he rang me while I was sitting on the toilet.
"He said: "Look Roy, we'll be glad to have you." The club's board just had to sanction the deal," he added.
As history tells us, Keane opted for a move to Celtic instead of becoming a Galactico, but the former United man revealed he has regretted his decision ever since.
"I should have appreciated Real's offer more. It was the most attractive challenge in front of me but I didn't accept it," Keane explained.
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"In hindsight, I should have said to myself: 'Go, go to Spain, live there for a year and a half, learn the language, learn the culture.'
"I took a negative approach. The weather and the training might have given me another lease of life, another two years of playing."
Keane explained that his decision at the time was based on the fact he wanted to be a key-man at his next club, and not settle for a secondary role at Madrid.
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"It's no good playing for a club, it's about having a big influence," Keane added.
"Real Madrid might just have wanted someone to do a job, sit in the middle of the park for a few games. But I wanted to go in and have an effect on a team."
Tom Jenkins