Sir Alex Ferguson labelled him the best he's ever worked with, aspiring footballers and Reds everywhere worshipped the ground he walked on: Roy Keane epitomised the unwavering spirit and desire to succeed Manchester United stands for.
Few sportsmen lead from the front in the way Keane did, on and off the pitch - and the fact that more than 70,000 United and Celtic fans paid their tributes to him at his testimonial before he retired in June 2006 says it all.
Images of him rallying the troops, covering every blade of grass in the process define the 1990s for United. He was not afraid to speak his mind in front of the media,
particularly if he felt his colleagues were not reaching the high standards he expected.
The Cork-born midfielder began his career with Cobh Ramblers after failing to gain an apprenticeship in English football. Brian Clough took him to Nottingham Forest before he completed a then-record £3.75 million switch to Old Trafford in the summer of 1993.
Two goals on his home debut, a 3-0 win over Sheffield United, served notice of what would follow, and the gladiatorial Keane won the first of seven Premiership medals that season, adding a European Cup, Intercontinental Cup and four FA Cup winners' medals along the way.