Celtic boss Gordon Strachan has not given up hope of beating Barcelona at the Nou Camp next week and believes scoring the first goal could hold the key to an upset.
Strachan's side lost 3-2 to Barcelona at Celtic Park last week, and even if Celtic win in Spain those three away goals could be crucial to Frank Rijkaard's side.
Celtic must either come out on top by two clear goals or win a high-scoring match next Tuesday to progress to the quarter-finals of the Champions League.
The visitors will also need to keep Thierry Henry, Lionel Messi, Ronaldinho and Samuel Eto'o quiet.
But Strachan is not giving up hope of advancing to the last eight - despite saying after the first leg, 'I wouldn't put my house on it'.
He told Celtic View: 'Our aim going into the Barca game is to score the first goal at any time during the match, whether it be the first or last minute, and make it exciting. That's it.
'There are going to be thousands of fans travelling over, but it wouldn't matter if there were 10 or 10,000. You simply have the responsibility to do your very best for the people who travel to support you.'