Dortmund through in cup

Mats Hummels put the Bundesliga champion ahead in the 22nd minute and Marcel Schmelzer made it two 10 minutes later.

Mario Gotze added a third four minutes after the break and Julian Schieber added to the host's misery with a fourth in the 79th minute.

Aalen did finally have something to cheer, but Michael Klauss' 87th-minute effort was mere consolation.

Schalke continued its good form with a 3-0 home win over another second-tier side, Sandhausen.

Ibrahim Afellay scored the first after 11 minutes, with Ciprian Marica (62) and Klaas-Jan Huntelaar (79) also finding the target.

Freiburg scored at either end of the match in a 2-0 win at Eintracht Braunschweig.

Daniel Caligiuri got the opener in the first minute and Johannes Flum sealed the victory six minutes from time.

Mainz was a 2-0 winner at home to Erzgebirge Aue, Andreas Ivanschitz (18) and Yunus Malli (47) with the goals.

Augsburg won 1-0 at Preussen Munster thanks to a 69th-minute effort from Jan-Ingwer Callsen-Bracker.

Elsewhere, 1860 Munich won 3-0 at Berliner AK, Bochum won 3-1 at TSV Havelse, while Cologne needed a penalty shootout to see off Wormatia Worms after the match ended goalless.