Roy Keane "killed" Ruud van Nistelrooy for months about his long hair when he first joined Manchester United - eventually forcing the Dutchman to chop his barnet.
The forward moved to Old Trafford in 2001 at a time when Keane, then captain, was a major force in the dressing room. The Irishman's no nonsense stance helped keep the players in line and he quickly took aim at Van Nistelrooy for the length of his hair.
The Dutchman, who would go on to break Premier League records in his debut season, was adamant that Keane's grilling wouldn't force him down the barbers, but the relentlessness eventually made him u-turn and the striker, after receiving a barrage of abuse, had it cut.
