Premier League chairman Richard Scudamore has paid tribute to Manchester United boss Sir Alex Ferguson after his retirement announcement this morning.

Scudamore said Ferguson's "drive, ambition, skill, passion and vision" have forever altered the landscape of football.

"The Premier League has had the privilege to witness many great players, managers and teams. No one has made as great a contribution to the Premier League than Sir Alex Ferguson," said Scudamore.

"His drive, ambition, skill, passion and vision have not only shaped Manchester United, but in many ways the game of football as we now know it.

"Sir Alex and his teams during the Premier League era have set the pace others have had to follow; 13 titles out of 21 seasons is a phenomenal achievement. What always stood out though was the reaction to missing out, personified in this season's campaign."