With his team trailing 3-1 away at Augsburg, the teenage sensation came on as a 56th-minute substitute and turned the game on its head.
Within just 23 minutes of being on the pitch, Håland struck a stunning hat-trick to lead his team to a 5-3 victory.
Jadon Sancho and Julian Brandt got Dortmund’s other goals to ensure Lucien Favre’s side remain in the hunt for the Bundesliga title.
It means Håland has now scored a hat-trick in all four competitions he’s played in this season — the Austrian Cup, Champions League, Austrian Bundesliga and German Bundesliga — and becomes only the second player in Dortmund’s history, after Pierre-Emerick Aubameyang, to score a debut Bundesliga treble.
That the 19-year-old’s debut hat-tricks in the Champions League and Bundesliga both came with his first three shots gives some indication of just how lethal he is in front of goal.
Following his goal-scoring exploits for Red Bull Salzburg in the Champions League and the Austrian Bundesliga, Håland became the most sought-after talent in European football.
Several of the continent’s biggest clubs, including Manchester United and Juventus, were rumored to be interested in the Norwegian star but Dortmund beat them all to his signature.
The German club reportedly paid just €20 million ($22M) for Håland’s services; even after just one match, it’s already looking like a bargain.