Rampant Dortmund win again

Aubameyang tapped in after fine work by livewire Ousmane Dembele to give Thomas Tuchel's side the lead on the stroke of half-time at the Signal Iduna Park.

Polish international right-back Lukasz Piszczek doubled Dortmund's advantage early in the second half after Caglar Soyuncu had turned a Gonzalo Castro cutback into his path.

Maximilian Philipp got one back for the visitors with a good finish on the hour mark but Raphael Guerreiro, a second-half substitute for Mario Goetze, secured the points in stoppage time at the end of a fine move.

Dortmund, 5-1 winners at Wolfsburg in midweek, have won their last four matches in all competitions and scored 20 goals in the process since a 1-0 loss to RB Leipzig a fortnight ago.

They trail Bayern on goal difference before Carlo Ancelotti's side visit winless Hamburg on Saturday bidding to maintain their perfect start to the season.

Cologne can also climb back up above Dortmund if they can inflict a first defeat on newly-promoted Leipzig on Sunday.