El paso de Sir Alex Ferguson por el Manchester United, en imágenes

(FILES) In this file picture taken on May 26, 1999 Manchester United manager Alex Ferguson celebrates with his players, after they defeated Bayern Munich in the Champions League final in Barcelona. Alex Ferguson is to retire as the manager of Manchester United, the English Premier League champions announced on May 8, 2013. Ferguson, 71, has been in charge at Old Trafford for 26 years, guiding United to 13 Premier League titles and two Champions League crowns. AFP PHOTO/JAN NIENHEYSEN

(FILES) In this file picture taken on April 13, 2008 Manchester United's Portuguese midfielder Cristiano Ronaldo (L) and manager Sir Alex Ferguson receive their player and manager of the month awards before their English Premier League football match against Arsenal at Old Trafford in Manchester, north west England. Alex Ferguson is to retire as the manager of Manchester United, the English Premier League champions announced on May 8, 2013. Ferguson, 71, has been in charge at Old Trafford for 26 years, guiding United to 13 Premier League titles and two Champions League crowns. AFP PHOTO/PAUL ELLIS –

(FILES) In this file picture taken on May 21, 2008 Manchester United manager Sir Alex Ferguson holds up the trophy after beating Chelsea in the final of the UEFA Champions League football match at the Luzhniki stadium in Moscow . Alex Ferguson is to retire as the manager of Manchester United, the English Premier League champions announced on May 8, 2013. Ferguson, 71, has been in charge at Old Trafford for 26 years, guiding United to 13 Premier League titles and two Champions League crowns. AFP PHOTO / Adrian Dennis

(FILES) A file picture taken on December 30, 2006, shows Manchester United manager Alex Ferguson waving to the crowd prior to a match against Reading in Manchester. Alex Ferguson is to retire as the manager of Manchester United, the English Premier League champions announced Wednesday May 8, 2013. Ferguson, 71, has been in charge at Old Trafford for 26 years, guiding United to 13 Premier League titles and two Champions League crowns. AFP PHOTO / ANDREW YATES/FILES