A home win over Wigan Athletic on Sunday will secure the Premier League after a three-year drought and the Londoners will start as huge favourites in the FA Cup final against Portsmouth six days later.
Russian multi-billionaire owner Roman Abramovich will no doubt greet a first double with his usual understated grin.
Yet when he sits down to watch Chelsea's Champions League conquerors Inter Milan take on Bayern Munich in the final on May 22, Abramovich will surely wonder what might have been if Jose Mourinho - who is eyeing a treble with Inter - had stayed as boss at Stamford Bridge.
Not the obsessive, cagey tactician like the self-styled "special one" Mourinho, nor did he sink to the Arsene Wenger routine of apparently blaming others when Arsenal lost.
Similarly he stayed calm when things were going well and he remained steadfastly above the "mind games" of Alex Ferguson which had successfully psyched out other title-contending managers.
"The manager was crazy, so we went into the second half knowing what we had to do. He went mad at us," said midfielder John Obi Mikel as Chelsea kicked on from a 1-1 halftime scoreline to win 4-1.
"He shouted at us in English and Italian, everything. When he's mad he mixes everything up. He was not happy. Normally, he's pretty laid back. But when things are not going right, that's when he goes a bit mad."
The fans and the media's view remains, however, firmly restricted to a far more sober, almost party-pooping, kind of character.
When Chelsea fans sang at one recent game "Carlo, Carlo give us a wave", it needed the intervention of assistant and Chelsea long-termer Ray Wilkins to make him aware of the call, to which he eventually responded with a sheepish flap of the arm.
