DORTMUND, Germany :Five-time European champions Barcelona reached their first Champions League semi-final in six seasons with a 5-3 aggregate victory despite being beaten 3-1 by Borussia Dortmund on Tuesday.

Serhou Guirassy scored a hat-trick for Dortmund to condemn Barca to their first defeat across all competitions this year but that could not prevent the Catalans from reaching the last four.

The Guinea international - the competition's top scorer with 13 goals - opened his account with an 11th minute chipped penalty, and he headed in the hosts' second goal four minutes after the restart as the hosts attempted to bounce back from last week's 4-0 first leg loss.

Dortmund's attempt to match Barcelona's Champions League record of overturning a four-goal first leg deficit in a knockout stage was derailed by Ramy Bensebaini's 54th minute own goal that settle Spanish nerves.

Guirassy completed his hat-trick in the 76th, pouncing on a defensive error, but, with Dortmund still needing two more goals to take the game to extra-time, the hosts gradually ran out of steam.

Barcelona will play either Inter Milan or Bayern Munich, who face each other on Wednesday, in the last four.