Sunderland's Ki Sung-Yueng has talked up the "unbelievable" win over Chelsea in the League Cup on Tuesday evening.

The Black Cats beat the Blues 2-1 after extra time to go through to the semi-finals, and Ki, who scored the winning goal, said that the players were excellent throughout.

"The result is unbelievable," Ki told Sky Sports News.

"I didn't expect to score but I am very pleased to help the team go through. This was a very hard game for us and I think the boys who played today were brilliant.

"We will get confidence from this win, and we still have plenty of games to go in the Premier League."

Gustavo Poyet's side are currently bottom of the table.