In a game that looked, on paper, to be a foregone conclusion, Sunderland began brightly, with Emanuele Giaccherini nodding narrowly wide from a Sebastian Larsson free-kick after 20 minutes.
After reaching the half-time interval on level terms, the Black Cats were made to pay for their missed opportunity as Frank Lampard looked to have diverted the ball past Vito Mannone to make it 1-0. Replays revealed that it was indeed Lee Cattermole that sent Cesar Azpilicueta’s cross over the line, with referee Anthony Taylor alerted to the incident by the new goal line technology in place.
As the clock ticked towards 90 minutes it looked as if Jose Mourinho’s men were set to book their spot in the last four, but second-half substitute Fabio Borini levelled proceedings with just minutes left to play. The Italian – a former Chelsea player – coolly slotted the ball past Mark Schwarzer after Jozy Alditore has kept play alive in he penalty area, to send the game beyond 90-minutes.
David Luiz saw a goal-bound effort saved four minutes into extra-time, and his side were the made to pay with seconds remaining on the clock. Borini was once again involved as he poked the ball to Ki, who cut inside before putting the ball beyond the reach of Schwarzer and into the bottom corner.
The result puts Sunderland in the pot for the semi-finals with Manchester City, while Tottenham, West Ham, Manchester United and Stoke will be battling to join them this evening.