Roy Keane had become disillusioned with his job at Aston Villa for some time, it has been revealed.
Keane quit as assistant manager with Villa yesterday.
The Daily Mail says it is understood Keane had become increasingly disillusioned with working at Villa in recent weeks and continued for as long as he felt able.
There are believed to have been clashes with players over training intensity - Keane's high standards are well-known - and he has notably been more withdrawn during matches.
There was also understood to be a growing dislike for his journey from his Cheshire home to Bodymoor Heath each day, a trip that takes one hour, 45 minutes.
