MANCHESTER, England (Reuters) - Reaction to Wednesday's announcement by Premier League champions Manchester United that manager Alex Ferguson will retire at the end of the season: David Gill, Manchester United chief executive, in a statement: "We knew that his retirement would come one day and we both have been planning for it by ensuring the quality of the squad and club structures are in first-class condition. What he has done for this club and for the game in general will never be forgotten. ... More...