Jose Mourinho continues to have the upper hand over old foe Arsene Wenger, marking his 200th match at the Chelsea helm with a comprehensive Capital One Cup victory at Arsenal.
The fourth round tie between the sides first and second in the Barclays Premier League was not quite the thrilling sideshow many had hoped for, but one which highlighted the Blues' strength in depth.
Cesar Azpilicueta and Juan Mata came in from the cold to net either side of half-time in a 2-0 Chelsea win - a result which means Wenger has now failed to overcome Mourinho in all their nine meetings.
The last encounter before tonight was the 2007 League Cup final, which the west Londoners won during a time in which the managers' relationship was far more fractious.
Those differences appear to have diminished over a time, with Mourinho's ire in the build-up instead focusing on the schedulers.
Initially threatening to field Chelsea's under-21 development side in protest of the match being little over 48 hours after the league clash with Manchester City, he eventually backed down in respect to Chelsea's fans.
The Portuguese still made 10 changes to Sunday's 2-1 win but all of those introduced were senior internationals, who were backed vociferously from the outset by 9,000 travelling fans.
Those supporters, like on Sunday, were grateful to a defensive mistake from their opponents. This time Carl Jenkinson was at fault, with Azpilicueta latching onto his poor back header to prod home midway through the first half.
Nacho Monreal almost levelled immediately and Aaron Ramsey came close on a number of occasions early in the second half, only for Chelsea to ensure the repeat of the final six years ago would go the same way.
Mata, still yet to prove himself indispensable to Mourinho, controlled the ball on the edge of the box and took a touch before unleashing a venomous right-footed strike, booking Chelsea's place in the fifth round.
Arsène Wenger said yesterday that he had made his peace with Jose Mourinho and put aside the deep grievances from the Chelsea manager’s first spell at the club, when the Arsenal manager was close to taking legal action against his counterpart.
Strange but true: Jose Mourinho once fell out with Arsène Wenger over a Christmas card. It was in 2005, at the very height of their antipathy towards one another and for a few days it became an issue between the two men that even those who worked with them despaired of.