The Swans surprised the Blues at Stamford Bridge a fortnight ago and managed to hold out for a famous two-legged victory to reach their first major cup final in club history.
Chelsea star Eden Hazard was sent from the pitch for a ridiculously poor decision on his behalf when he attempted to quickly retrieve the ball from a ballboy with his foot 10 minutes remaining but proceeded to kick the youngster.
This action prompted referee Chris Foy to produce a red card and dash Chelsea's already slim hopes of scoring twice at the death.
A resilient Swansea managed to deal with whatever the Blues threw at them and in the end it paid dividends as they moved through to the decider where they will meet League Two Bradford City at Wembley on February 24.
Capital One Cup semi-final second leg