Gerard Pique said Barcelona's chances of reaching the Champions League final are "almost impossible" following a 4-0 defeat against Bayern Munich.
The newly-crowned Bundesliga champions put on a rampant display in front of their own fans to all but seal a place in May's showpiece at Wembley which will be their second final in a row.
When asked to assess Barca's lacklustre performance post-match Pique refused to make excuses but targeted a second leg win for the club's fans.
He told television channel TV3: "There's not much you can say, they've been faster, stronger and played the better football.
"We mustn't talk about the referee, I don't think he had any influence (on the result). It's almost impossible for us.
"They've been better than us, we need to congratulate them and show our best in the return leg while thinking about finishing the league as soon as possible. We are Barca, we must go out at the Nou Camp to win the game for our fans."
Information from the Press Association was used in this report.