Marco Reus scored a first-half winner as Borussia Dortmund battled past visiting Hoffenheim 1-0 to move into the German Cup third round on Wednesday.
Dortmund have now won each of their three German Cup encounters against Hoffenheim.
Bundesliga leaders Bayer Leverkusen also advanced with a 5-2 win at Sandhausen. Bundesliga club Freiburg crashed out of the competition after losing 3-1 at home to second tier Paderborn.