4 - 0
(2 - 0)
⚽ E. Haaland (29), ⚽ R. Guerreiro (45), ⚽ T. Hazard (48), ⚽ R. Guerreiro (63)
|Signal Iduna Park.||Photo: Marco Verch, CC BY-SA 2.0|
Jadon Sancho was left out of the line-up as a precautionary measure after struggling with a muscle problem in the build-up to the game.
With Sancho benched, 17-year-old Giovanni Reyna was set to make his first start for BVB. But after the youngster picked up an injury in warm-up, he was replaced by Thorgan Hazard, who had a hand in the first goal as he set up Erling Haaland's opener after 29 minutes.
Raphael Guerreiro doubled the lead shortly before half-time, rounding off a dominant first-half performance from 'Die Schwarzgelben'.
Shortly after the break, Thorgan Hazard got on the scoresheet himself to make it 3-0 with a great finish before Guerreiro put the ball into the back of the net for the second time with 63 minutes on the clock to secure a 4-0 victory.
With the win, second-placed Dortmund are just one point behind league leaders Bayern München before the reigning champions face Union Berlin on Sunday.
Elsewhere, title contenders RB Leipzig were held to a 1-1 draw at home against Freiburg, who had a goal ruled out for offside in injury time, while Bruno Labbadia got off to a great start as Hertha BSC coach as he watched his side thump Hoffenheim 3-0 away from home.
At WWK Arena, Augsburg were beaten 1-2 by Wolfsburg as Daniel Ginczek scored a late winner while relegation rivals Fortuna Düsseldorf and Paderborn drew 0-0 at Esprit Arena.