Jose Mourinho got the better of old adversary Arsenal F.C.'s Arsene Wenger once again as Chelsea F.C. showed their strength-in-depth by reaching the League Cup quarter-finals with a 2-0 win over London rivals Arsenal F.C. on Tuesday.
Both teams rang the changes but it was Chelsea's new-look side that gelled, restricting the hosts to a few sights of goal while consistently threatening on the break and finding the net through Spaniards Cesar Azpilicueta and Juan Mata.
It was a difficult night for Wenger, who enjoyed a simmering feud with the Chelsea boss during the Portuguese's first spell in the Premier League with the West London side and has now not beaten Mourinho in nine attempts.
Manchester United will also be in the draw for the last eight after overcoming Norwich City 4-0 with two goals from Mexican Javier Hernandez, but there was an upset for Premier League Fulham who lost 4-3 at second tier Leicester City.
West Ham United beat Burnley 2-0 away in their tie with late penalties from Matt Taylor and Jack Collison, while spot kicks were needed to separate Stoke City and Birmingham City.
After the match finished 3-3 and then 4-4 after extra time, top flight Stoke came through 4-2 in the shootout.
Arsenal F.C. and Chelsea reminded everyone of the League Cup's standing in the list of priorities by making 18 changes between them from their teams that played in the league at the weekend.
Wenger fielded a strong midfield with Aaron Ramsey, Santi Cazorla and Jack Wilshere marshalling the centre circle, but they struggled to make an impact as Chelsea sat back, soaked up the pressure and looked to hit the hosts on the counter.
Mourinho's side got their reward after 25 minutes when a swift Chelsea break ended with Azpilicueta nipping in to intercept a poor header back by Carl Jenkinson and poking the ball past onrushing goalkeeper Lukasz Fabianski for the opener.
Arsenal F.C., who have testing fixtures against Liverpool and Borussia Dortmund to come in the next eight days, were off the pace and struggled to conjure a chance with Welsh midfielder Ramsey firing their best effort wide