Borussia Dortmund have failed to score in five of their past six matches in the Champions League, having scored in 12 games in a row before this run.
Barcelona have failed to score in their opening match of a Champions League campaign for the first time since 2009-10 against Inter Milan - their opponents won the competition that season.
Barcelona are now unbeaten in their last 14 Champions League group stage matches against German sides (W11 D3), starting in October 2001 against Bayer Leverkusen.
This was Borussia Dortmund manager Lucien Favre's 10th game as manager in the Champions League - in all 10 matches, at least one side has kept a clean sheet.
Ansu Fati (16y 321d) has become the first 16-year old to appear for Barcelona in Champions League history, overtaking Bojan (17y 22d) as their youngest player in the competition.