Juan Mata and David Luiz, who had notably been left out of the Blues line-up against Fulham on Saturday, were both involved in a 2-0 win at the County Ground.
Two goals in six first-half minutes from Fernando Torres and Ramires gave the visitors the win, although their success was tempered by the loss of Marco van Ginkel and Ramires to injury.
|VIEW FROM THE COUNTY GROUND
|By Stephen Darwin
All the pre-match talk focused on Juan Mata and how tonight was his big chance to show Jose Mourinho he deserves to start in that star-studded Chelsea attacking line.
But while Mata showed flashes of his brilliance it was ultimately Fernando Torres that shone brightest. The Spain striker scored one and set up the other for Ramires and will hope that will nudge him to the front of queue to start in the crucial Premier League game against Tottenham on Saturday.
The Capital One Cup was Mourinho's first trophy in his first spell as Chelsea boss and who's to say he won't win it again this time around.
Torres opened the scoring in the 29th minute with a poacher’s finish after Juan Mata saw his shot saved by Wes Foderingham.
And Ramires doubled the lead soon after as he lifted a ball into the net following a neat pass from Torres, who had wriggled free outside the area in expert fashion.
As well as the returns of Mata and Luiz, Jose Mourinho gave Mark Schwarzer his Chelsea debut in goal, Cesar Azpilicueta made his 50th club appearance, and there were also starts for Kevin De Bruyne and Willian.
Swindon boss Mark Cooper made one change from the side victorious against Bristol City last time out, with Alex Pritchard replacing Louis Thompson in midfield.
Chelsea were forced into an early change when young Dutchman Van Ginkel twisted his knee after falling awkwardly, with the 20-year-old appearing to be in a lot of pain as he hobbled off in the 10th minute.
After a tight opening to the game, Mourinho’s men had the first sight of goal midway through the half.
Mata threaded a neat ball into Torres and the striker cut in front of his man but saw Foderingham make a save with his head to deny him.
Minutes later, though, the former Liverpool man made no mistake as he broke the deadlock after neat build-up play between Ramires and Mata.
Mata’s shot was saved by Foderingham, but Torres was on hand to pounce on the loose ball and poke home from a matter of inches.
And Torres then turned provider in the 35th minute as the visitors doubled the lead. The Spaniard played a perfectly weighted pass for Ramires to run onto inside the penalty area, leaving the Brazilian to calmly lift the ball over the advancing keeper and into the back of the net.
Danny N’Guessan thought he had halved the deficit for the hosts early in the second half when he met a Jay McEveley free kick and headed past Schwarzer, but the goal was ruled out for offside.
Swindon provided more of an attacking threat after the break, but Schwarzer was rarely tested in the Chelsea goal.
And the hosts were nearly punished for pressing forward in the closing minutes but Torres and Willian were both denied by resilient defending as the Premier League side eased through to round four.