Cristiano Ronaldo or Lionel Messi? Sir Alex Ferguson says who is best

Former Manchester United manager Sir Alex Ferguson reveals who he thinks is the best player in the world out of Cristiano Ronaldo and Lionel Messi.

Ferguson was speaking to 1991 world snooker champion John Parrott as part of a light-hearted interview about his love of snooker and his favourite football anecdotes.

Watch more from Sir Alex Ferguson's interview on the BBC iPlayer.