Charlie Mulgrew admits he should have scored a header for Celtic moments before Barcelona scored their winner.
A stunning double save from Fraser Forster prevented Barcelona from going 2-0 up against Celtic, who were left to rue a couple of golden chances when it was 0-0.
Moments after Charlie Mulgrew missed a gilt-edged opportunity to give ten man Celtic an unlikely lead against Barcelona, Cesc Fabregas fired the Catalans ahead.
Celtic's Scott Brown was sent off with more than half and hour to play against Barcelona for kicking out at Neymar, who added some mild theatrics to the occasion.
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Adam Matthews misfires in comical fashion during a pretty uneventful first half in Glasgow.