Chris Maguire was first to have an effort for the visitors after Darren Mackie won the ball in midfield, but the young striker took too long before shooting allowing Celtic keeper Fraser Forster to narrowtheangle and put the ball out for a corner.
However, Atletico almost went two in front four minutes before the break when their Czech defender Tomas Ujfalusi stripped Daniel Agger of the ball on the right side of the box and skipped past two weak challenges before, trying ambitiously to score from a narrowangle, putting the ball into the side of the net.