Pengurus Borussia Dortmund, Lucien Favre, masih belum pasti waktu untuk Marco Reus kembali daripada kecederaan otot.
Marco Reus has started indoor training but Borussia Dortmund are not certain when the Germany international will play again.
Erling Haaland has scored eight goals in his first four Borussia Dortmund appearances, despite three of those coming from the bench.
Borussia Dortmund have their sights set on domestic and European honours, but the loss of Marco Reus for up to a month will come as a blow.
Erling Haaland did not take a full part in Borussia Dortmund's mid-season training camp and Lucien Favre does not want to risk his fitness.
Erling Haaland joined Borussia Dortmund at the start of the month, much to the joy of Marco Reus, who compared him to Robert Lewandowski.
FIFA Ultimate Team's latest Team of the Week has Aaron Wan-Bissaka, Sadio Mane, Marco Reus and Memphis Depay in it.
The pressure on Lucien Favre is growing after Borussia Dortmund lost at Barcelona, with captain Marco Reus accepting they are struggling.
Borussia Dortmund's captain Marco Reus scored a late leveller at home to Paderborn but blasted their display in Friday's Bundesliga game.
Borussia Dortmund must put their Bayern Munich loss behind them, head coach Lucien Favre said.