On 8 May 2013, the football world rejoiced when the news came through that Sir Alex Ferguson was walking away from Manchester United and into retirement. After 38 trophies in 27 years - including 13 Premier League titles, two Champions League crowns and the first Treble by an English side - you could understand the relief. Now, with Manchester City confirming Pep Guardiola is on his way out of Etihad Stadium, the feeling is mutual.
