The return of the 'special one' has bought with it a new sense of optimism among Chelsea fans at Stamford Bridge this season.
In a controversial move back to what Mourinho likes to call 'his home', many are predicting Chelsea as 2013/14 EPL champions.
Twice a Premier League winner with the Blues in his first spell as manager, Mourinho and Chelsea have that advantage over the other competitors - he's very much 'been there,done that and got the t-shirt'.
So far, Chelsea have displayed typical 'Mourinho performances'. The Blues went to Old Trafford last Monday with a defensive game plan - asking Moyes and United what they had, and it worked as they came out with a 0-0 draw which Mourinho will take every day of the week. It's like Mourinho's never been away!
A typically gutsy and excellent performance against Bayern Munich in the Super Cup almost saw the Blues become victorious underdogs had it not been for Javi Martinez's last-kick equaliser in extra time and then of course, penalties.
Chelsea have an equally strong defensive and attacking side with Mourinho assembling a highly-talented squad which has been boosted further with the additions of Willian, Andre Schurrle, Samuel Eto'o, Marco van Ginkel and Christian Atsu among others.
The new signings and manager they have could make them a real force if they hit the ground running and the early signs this season suggest that this could very well be the case. My only doubt would be the strikers. After strangely letting Romelu Lukaku go out on loan to Everton, will Fernando Torres and Demba Ba pull their weight this season after disappointing for Chelsea so far in their careers and will 32 year old Samuel Eto'o a) settle in England and b) be the same force that he once was ?