Ki Sung-yueng was on cloud nine after Sunderland shocked Chelsea 2-1 in the Capital One Cup quarter-final.

The South Korean scored an extra-time winner in the 118th minute of the league cup clash and was in a very buoyant mood after helping the Wearside outfit through to the semi-finals.

"It was just unbelievable," the Swansea City loanee told Sky Sports.

"I didn't expect to score but I am really pleased to help the team go through.

"This was a very hard game for us, we didn't give up... the boys played unbelievable."

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