Roy Keane warned Alex Ferguson about taking on Irish billionaire John Magnier over Rock Of Gibraltar.
A bitter row broke out between Ferguson and the former Manchester United shareholder, who owned almost 30 per cent of the club with JP McManus, in early 2003 over the horse's stud rights, with a legal settlement reached in March 2004.
The first horse ever to win seven consecutive Group Ones in the northern hemisphere, Rock Of Gibrlatar's death was announced by Coolmore on Monday.