Roy Keane's relentless pursuit of success saw him become one of the finest midfielders of his generation and win 12 major trophies in a 17-year playing career.
His uncompromising manner also saw him engage in fierce rivalries with opposition players, managers and even team-mates inside his own dressing room.
Since hanging up his boots in 2006, Keane has transferred his ruthless style into life as a coach and pundit. Sportsmail recalls his most acidic put downs and one-liners in recent years.
Roy Keane's relentless drive saw him become one of the finest midfielders of his generation
Keane on Carragher not winning the Premier League
Roy Keane knows a thing or two about winning Premier League titles.