Lionel Messi was introduced as a second-half substitute after a month out with a calf injury in Barcelona's 0-0 Champions League draw away to Borussia Dortmund. Reuters
Ansu Fati, 16, became the youngest ever Barcelona debutant in a Uefa competition. Reuters
Barcelona's Antoine Griezmann failed to make the breakthrough against Dortmund. EPA
Barcelona's Antoine Griezmann in action. Reuters
Barcelona's Anssumane Fati falls to the ground. Reuters
Barcelona's Antoine Griezmann in action. Reuters
Barcelona's Ansu Fati in action. EPA
Barcelona's Antoine Griezmann in action with Borussia Dortmund's Mats Hummels. Reuters
General view inside the stadium before the match. Reuters
Dortmund's Marco Reus collides with Barcelona's goalkeeper Marc-Andre ter Stegen. EPA
Dortmund's Paco Alcacer in action against Barcelona's goalkeeper Marc-Andre ter Stegen. EPA
Barcelona's Lionel Messi in action . EPA
Barcelona's Lionel Messi in action against Dortmund's Thomas Delaney and Marco Reus. EPA
Dortmund's Julian Brandt in action against Barcelona's Frenkie de Jong. EPA
Barcelona's Luis Suarez in action against Dortmund's Mats Hummels. EPA
Dortmund's Mats Hummels reacts. EPA
Barcelona's Lionel Messi reacts to another pro,mising attack breaking down. EPA
Dortmund's Marco Reus in action against Barcelona's goalkeeper Marc-Andre ter Stegen. EPA
Dortmund's Raphael Guerreiro in action against Barcelona's Lionel Messi. EPA
Dortmund's Marco Reus saw his 57th-minute penalty saved by Barcelona goalkeeper Marc-Andre ter Stegen. EPA