Chelsea assistant first team coach Steve Holland says it was important to avoid extra time against Bolton on Wednesday night.
The Blues dominated the game but goalkeeper Petr Cech had to be alert to save a Lee Chung-yong effort in the dying minutes of the game.
Chelsea move on to face Shrewsbury in the next round after the Shrews battled past Norwich on Tuesday night.
"We were very happy with the performance from the team tonight," Holland said after the match.
"It's nice not to have extra-time. We don't have any new injuries, we've progressed to the next round of the competition.
"Several of our players who probably needed a game now have 90 minutes under their belts heading into two or three important fixtures. It's a good situation to be in.
"Andre's [Schurrle] performance reflected the mentality of the team.
"When you think not much more than two months ago he was playing in a World Cup final, tonight he's playing in the third round of the Capital One Cup and showed a really committed performance, full of ambition and drive all night, was dangerous throughout the game, looked our most likely source.