The teenage forward ensured Thomas Tuchel's side finished 2016 with an unbeaten home record but they lost further ground in the Bundesliga title race
Stuttering Borussia Dortmund ended 2016 with an unbeaten home league record, but a 1-1 draw against Augsburg means they could be as many as 12 points adrift of the Bundesliga leaders heading into the mid-season break.
Thomas Tuchel's side's only loss at Signal Iduna Park in the calendar year came in the DFL-Supercup to Bayern Munich in August and, with Carlo Ancelotti's leaders facing second-placed RB Leipzig on Wednesday, Dortmund had the chance to crank up the pressure.