An own goal took Swansea past Championship side Middlesbrough to reach the semi-finals of the League Cup.
Middlesbrough defender Seb Hines headed a Swansea corner into his own net in the 81st minute after a scrappy encounter at the Liberty Stadium.
It's the first time Swansea have it through to the semi-finals.
"It was a very important victory and now we're in the last four," Swansea manager Michael Laudrup said.
"They are a good side, and we may be playing them next year in the Premier League. In the second half we came out and dominated like we normally do at home."
Fourth-tier Bradford City upset Premier League Arsenal on Tuesday to secure a semi-final spot alongside Aston Villa who beat Norwich City.
Chelsea, who are playing in the World Club Cup in Japan, face Leeds United in the final last-eight clash on Dec. 19