Sir Alex Ferguson - I Only Had FOUR World Class Players at Manchester United. See Their Names...

Sir Alex Ferguson has claimed only four of his Manchester United players could be truly regarded as 'world-class'.

Ferguson confirmed Cristiano Ronaldo as the greatest player he worked with at Old Trafford.

He also put Eric Cantona, Ryan Giggs and Paul Scholes among the elite, as he reflected on his career in his new book 'Leading'.

Ferguson said: 'If you read the papers or listen to the television commentators, we seem to be awash with 'world-class' footballers.