Sir Alex Ferguson took the decision to retire from his position as the manager of Manchester United due to 'too much stress' to ensure continued success at Old Trafford, according to former England boss Fabio Capello.
Ferguson revealed on Wednesday morning his decision to end his illustrious 26-year reign as Red Devils supremo at the end of the current campaign, with Everton's David Moyes tasked with succeeding the incomparable Scot.
Moyes will officially assume on the role on July 1 after his contract with Everton expires, and will take charge of his final game at Goodison Park against West Ham on Sunday.
Capello, meanwhile, says he had no inkling that Ferguson would leave Manchester United when the pair met a few months ago, and was taken by surprise when the 71-year-old revealed that he had decided to retire.
The current Russia manager, however, understands the reasons behind Ferguson's choice to exit Old Trafford after a 13th league win with Manchester United, having spoken to to the Red Devils legend on Thursday.
“I met him a few months ago at the England Sports Centre and he told me he would carry on, so the news of his retirement surprised me," Capello told reporters.
“I called him yesterday and he told me he has decided to go now because there is too much stress nowadays.
“Always having to win something is very challenging, and he told me he wanted to go around the world with his wife.
“His secret is amazing. To have that strength and ability to change things and improve every year, and always have the same desire to win.”