1. Drogba
When Chelsea were drawn with Galatasaray in the last-16 of the Champions League, it immediately prompted a love-in with former striker Didier Drogba.
Arriving at a cost of £24million, Drogba was one of Jose Mourinho's first signings when he signed in the summer of 2004 and, in the following eight years in West London, he proved to be value for money.
Scoring a total of 42 league goals in his three seasons under the 'Special One', Drogba was a key part of the team which claimed back to back Premier League titles in 2004/2005 and 2005/2006.
He's now taking on his former boss, and the Blues faithful will hope he doesn't score yet another Champions League goal at Stamford Bridge when the sides contest the second leg on March 18th.
With Drogba in mind, we at GMS have decided to take a look at six other stars who have made a big impact for Mourinho during his two spells at Stamford Bridge.
2. Ramires
surprise choice perhaps, but no man has featured in more games for Chelsea since Mourinho returned in the summer.
Ramires is a versatile player and has featured in a variety of midfield and attacking positions for the Blues this season.
Thought he may not take the headlines like some of his more established teammates, his appearance record alone shows how highly his manager rates him.
The sprightly Brazilian is full of energy and you can be sure he'll relish the run-in as Mourinho strives for immediate Premier League success.
3. Petr Cech
A good goalkeeper is a key part of any successful teams, and in Petr Cech Chelsea have one of the best.
Cech moved to Stamford Bridge in the summer of 2004, coinciding with the arrival of Mourinho, although his transfer had been agreed during the later stages of the Claudio Ranieri reign.
Mourinho immediately installed Cech as his first choice 'keeper and neither player or manager have looked back since, with Cech having yet to lose his place in the side during a decade at the club.
It was Cech's clean sheets which helped Chelsea to romp to Premier League success in 2005 and 2006 and if they are to repeat that in 2014, the 31-year-old will have no doubt been a major factor.
4. Makelele
If Ramires is ignored by headline writers, this man must have been all but non-existent in their eyes.
Despite that, Makelele was undoubtedly one of the most important players in Mourinho's initial three-year reign.
Such was his ability to effortlessly sit in front of the back four, breaking up attacks and giving the ball to more talented teammates, Makelele had a position named after him by fans and pundits alike.
Makelele also added title winning experience to a relatively unsuccessful Chelsea side, having won La Liga twice with Real Madrid before his 2003 switch.
5. Hazard
weren't short of creative talent under Mourinho during his first spell in charge, but few set the Bridge alight like Eden Hazard.
He's quick, he's skillful and he can score and make goals in equal measure, attributes that have made him a must in Mourinho's second coming.
Having featured in a joint-high 37 games in all competitions, Hazard has scored an impressive 14 goals and looks set to reach 20 before the season is over.
Eyebrows were raised when Mourinho continuously overlooked two-time player of the year Juan Mata earlier in the season, but Hazard's form has been so impressive that the Spaniard was allowed to join rivals Manchester United in January.
6. Lampard
Chelsea's all-time leading goalscorer really came of age when Mourinho took control at Stamford Bridge.
Frank Lampard managed 40 league goals in just three whole seasons under the Portuguese manager, underlying himself as one of the best goalscoring midfielders in world football.
Fittingly it was Lampard who scored the two goals when Chelsea clinched their first league title in 50 years with a 2-1 win at Bolton in April 2005, bringing his new gaffer immediate success.
The England midfielder has been used less frequently than in Mourinho's first spell at the club, but remains a key part of any potential success.
A genuine club legend, there is only one man who encompasses the spirit of Chelsea under Mourinho more than Lampard.