Borussia Dortmund claimed their first win of the Champions League group stage this season after battling to a 2-0 victory away to Slavia Prague.
Achraf Hakimi struck in each half to settle a scrappy encounter in the Czech Republic and move Dortmund top of Group F ahead of Barcelona's meeting with Inter.
The brilliance of Marc-Andre ter Stegen mostly kept Dortmund frustrated against Barca in their opening match, but Wednesday's performance was more in keeping with recent Bundesliga draws with Eintracht Frankfurt and Werder Bremen, in which they surrendered leads to draw 2-2.