Referee Robert Kampka shows a red card to Duisburg's Dominic Volkmer during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Marco Reus celebrates after scoring his side's 5th goal during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Giovanni Reyna, left, and Duisburg's Dominic Volkmer challenge for the ball during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Erling Haaland is fouled by Duisburg's Dominic Volkmer for a red card during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Jude Bellingham celebrates after scoring his side's second goal during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Jude Bellingham, right, celebrates after scoring his side's second goal during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Erling Haaland is fouled by Duisburg's Dominic Volkmer for a red card during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)

Dortmund's Marco Reus, 2nd from right, celebrates after scoring his side's 5th goal during the 1st round German Soccer Cup match between MSV Duisburg and Borussia Dortmund in Duisburg, Germany, Monday, Sept. 14, 2020. (AP Photo/Martin Meissner)