Former England manager Fabio Capello admitted he had been taken aback by Sir Alex Ferguson's announcement:
The former England coach Fabio Capello has revealed that Sir Alex Ferguson quit Manchester United because of stress, according to the Associated Press.
It is reported he told Sky Sports Italia: "I called him and he told me that he decided this way because of excess stress."
Ex-England manager Fabio Capello is expected to attend an event to celebrate 150 years of the FA later today.
The Russia manager left the England camp after a he fell out with the FA stripped John Terry of his captaincy over a racism row, and his attendance could see a thawing of the relationship.
Fabio Capello has been named as Russia's new manager - with the former England boss set to complete the formalities of his move to Moscow in the next few days.
The Italian held successful talks with the Russian Football Union (RFU), who have confirmed he is the man they believe can guide the team to World Cup qualification in 2014.