Lukasz Piszczek discharged Dortmund into the lead with a fine 20-yard strike.
England’s Sancho with expertise controlled Axel Witsel’s pass out to the left wing, cut within and slammed an occasional shot into the lowest corner.
Fellow teenager Haaland broached home from six yards out before Raphael Guerreiro blasted in an exceedingly fourth.
Sancho has netted twelve times in his past fourteen games in all competitions.
Norway striker Haaland has scored 9 goals in his first six games for Dortmund since a £17m switch from Rb Salzburg last month. he’s the first player to get eight goals in his first 5 Bundesliga appearances.
Only eight players have scored a lot of Bundesliga goals than Haaland this season.
Dortmund are one point behind leaders Bayern Munich, who visit Cologne on Sunday.