For while Chelsea have stuttered and slipped back from Premier League champions to Premier League also-rans, Mourinho has gone on to reach even greater heights.
Mourinho achieved such rapid success at Chelsea in such a short space of time that Abramovich came to expect nothing but glory and silverware. As such, when the trophies dried up, even a little, the Special One was shown the door.
Since then, Avram Grant, Luiz Felipe Scolari, Guus Hiddink, Carlo Ancelotti and Andre Villas-Boas have sat in the hot seat and none have looked like coming close to matching Mourinho's achievements.
As they have all discovered - Villas-Boas apart - the Russian billionaire can simply wake up one day and decide he has had enough and a change is needed.
This time, though, Abramovich is probably reasoning that if he does not give Villas-Boas time then the undoubtedly talented Portuguese may go on to great things at another club. As has happened with Mourinho.
Jose worked wonders at Inter Milan and is now doing so at Real Madrid, who currently lead Spain's La Liga by three points, with a game in hand, over the mighty Barcelona.
Here, we look at how Chelsea have fared since Mourinho's departure and how the man himself has fared since leaving Stamford Bridge.
Chelsea
2011/12
(Andre Villas-Boas)
Premier League: fifth*
Champions League: groups*
FA Cup: 3rd round*
League Cup: quarters
2010/11
(Carlo Ancelotti)
Premier League: 2nd
Champions League: quarters
FA Cup: 4th round
League Cup: 3rd round
2009/10
(Carlo Ancelotti)
Premier League: 1st
Champions League: last 16
FA Cup: winners
League Cup: quarters
2008/09
(Luiz Scolari/Guus Hiddink)
Premier League: 3rd
Champions League: semis
FA Cup: winners
League Cup: 4th round
2007/08
(Avram Grant)
Premier League: 2nd
Champions League: runners-up
FA Cup: quarters
League Cup: runners-up
 
 
 
 
 
Jose Mourinho
 
2011/12
(Real Madrid) La Liga: 1st*
Champions Lge: groups*
Copa del Rey: 4th round*
2010/11
(Real Madrid) La Liga: 2nd
Champions League: semis
Copa del Rey: winners
 
2009/10
(Inter Milan) Serie A: 1st
Champions League: winners
Copa Italia: winners
 
2008/09
(Inter Milan) Serie A: 1st
Champions Lge: last 16
Copa Italia: semis
2007/08
Sacked by Chelsea on Sept 20