Former players pay tribute to Sir Alex Ferguson

Barcelona's Gerard Pique, Fiorentina's Giuseppe Rossi and Portland Timbers' Mikael Silvestre - all former Manchester United players - have paid tribute to Sir Alex Ferguson on Twitter:


26 years, 13 league titles, 2 Champions Leagues, the Cup Winners' Cup, 5 FA Cups, 4 League Cups… Legend!


What a career! Proud and honored to have been coached by Sir Alex Ferguson. #thankyougaffer


Today a major page of history for #MUFC I'm so grateful to have been managed by the Best Thank you Sir Alex #mufcfamily

Read: 'Football. Bloody hell': Ferguson's career in quotes

Read: The life and times of Sir Alex Ferguson

Video: Manchester United players seen at races after Sir Alex decision


Sir Alex Ferguson to retire

Manchester United say Sir Alex Ferguson is to retire as manager after 26 years in charge. Everton boss David Moyes is widely expected to be his replacement.