Twitter verse: Ronaldo, Nistelrooy and other reactions to Fergie's retirement

In the hour following Sir Alex Ferguson's resignation, there were more than 1.4m mentions of the news on Twitter. The Manchester United legend announced that he will retire at the end of the season after winning 13 Premier League titles during his 26-year career at Old Trafford.[caption id="attachment_764163" align="alignleft" width="380"] There was no one in his league. Reuters [/caption]The peak in conversation on Twitter about SAF's resignation came at 9.34am this morning UK time. 13,000 Tweets per minute on the topic. Crazy.The 71-year-old has also won two Champions League crowns, five FA Cup titles and four League Cups, with the Scot lifting a total of 38 trophies in his decorated reign.Here is a selection of some interesting tweets as fans and players, past and present, pay tribute to one of the greatest-ever managers.