Rio Ferdinand revealed Roy Keane once punched Manchester United team-mate Chris Eagles square in the face during a Red Devils training session.
Former Irish international Keane was famed for his aggressive nature and will to win during his 12-year spell at Old Trafford where he won seven Premier League titles and the 1999 Champions League trophy.
United legend Ferdinand recalled the moment Eagles, who played 17 games over five seasons at the club, provoked Keane into a violent assault during a reserve team training session.
Rio Ferdinand revealed Roy Keane punched Chris Eagles in a Man United training session
Ferdinand told the VIBE with FIVE podcast: 'I remember when Roy Keane punched up Chris Eagles one time.