Haaland picked up where he left off by scoring the league's first goal, and his 13th in 12 appearances for Dortmund, following a two-month suspension in a Revierderby played out in an empty Signal Iduna Park.
Raphael Guerreiro doubled the hosts lead just before the interval following an error from the out-of-sorts Markus Schubert, and Thorgan Hazard beat the 21-year-old goalkeeper in the 48th minute.
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