Chelsea romped to victory with a five-star away win at Swansea.
Braces from Oscar and Costa, and an icing on the cake from Schurrle, granted Chelsea all three points, but Swansea were easy to gift the visitors all the spoils with many unforced errors committed.
In the end, the Blues, who have been subject to pressure of late from Manchester City and the media, made light work of what typically is a tough away encounter in Wales.
But Swansea were blown apart within 50 seconds, and there was nothing to stop Chelsea coasting to victory. Mourinho never won a match by more than four goals in his first spell, but with more performances like this, you can expect this spell to be much more stylish.
In truth, Cech had nothing to do. Quite literally, there was not a single Swansea shot on target, whilst there were 11 Chelsea ones. The Czech Republican goalkeeper, who some will say is only getting game time as a tactical ploy by Mourinho to keep him happy over this transfer period month, was not the only returnee, with Cahill also back in the fray.
But the attack stole the show. In truth, Swansea’s abject defending did. Sigurdsson uncharacteristically lost the ball and Oscar pounced inside a minute.
The second followed 19 minutes later. Such an intricate exchange of Chelsea passes and with Costa played onside by some shabby offside trap, the Brazilian-turned-Spaniard slotted home.
Cahill had a heart-in-mouth moment as he let the ball slip under his feet, only to save himself from Gomis running in in the nick of time.
But Chelsea had not stopped. Swansea concentration had been low all match but the all-time low allowed for Costa’s second. A blind back-pass was meant to look clever but Costa nicked in and slid home a third.
And that became four just 76 seconds later. More fine footwork saw Chelsea break with speed and when Costa pulled it back for the oncoming Oscar, the Brazilian drilled it high into the net.
Schurrle was to tap in from an Ivanovic assist three minutes after his arrival but the game had long been settled.
Man of the Match
DIEGO COSTA: This guy may not be a striker like Aguero who can curl one in from 18 yards or rifle one in from 30 yards, but where Costa lacks in variety, he more than makes up for with ruthless consistency within the box. Another exemplary performance from a man people feared was burning out, scoring two classic goals, if lacking in elegance. 9/10
Mourinho offered sympathetic words to a young colleague in Garry Monk: “I can understand that he was frustrated but the only thing I can say is that it’s better to lose one match 5-0 than to lose five games 5-0. I’m sure he will get a reaction from his team.”
Monk regretted his side’s poor start: “It was a horrible performance first half, we made mistakes continuously. Credit to them, their performance was devastating to take advantage of our mistakes.”