Jadon Sancho scored to send Borussia Dortmund into the semifinals of the German Cup with a 1-0 win at Borussia Mönchengladbach on Tuesday.

The game's buildup had been overshadowed by Gladbach coach Marco Rose’s move to Dortmund next season, but it was the 20-year-old Sancho who emerged as the main figure in a cagey quarterfinal.

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Moenchengladbach's Ramy Bensebaini, right, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Jadon Sancho scored to send Borussia Dortmund into the semifinals of the German Cup with a 1-0 win at Borussia Mönchengladbach on Tuesday.

Moenchengladbach's Ramy Bensebaini, left, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Dortmund midfielder Mahmoud Dahoud, one of several players facing their former team, was sent off in injury time with his second yellow card for a dangerous lunge at Ramy Bensebaini, who was booked for his reaction. Dahoud will miss the semifinal.

Moenchengladbach's Christoph Kramer, right, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Both sides missed good chances to score. Marcus Thuram should have scored early for Gladbach before Reus replied with another wasted opportunity at the other end.

Moenchengladbach's Stefan Lainer, left, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Thuram had a goal ruled out for offside before the break, and Haaland had another ruled out through VAR after it. Replays showed the Norwegian caught Bensebaini, causing him to fall, before he swept in Reus’ cross.

Moenchengladbach's Marcus Thuram, left, and Dortmund's Emre Can fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

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Moenchengladbach's Marcus Thuram, left, and Dortmund's Mateu Morey fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram, left, and Dortmund's Mateu Morey fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram gestures after a missed opportunity on goal during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram gestures after a missed opportunity on goal during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Jonas Hofmann, left, and Dortmund's Mahmoud Dahoud fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Jonas Hofmann, left, and Dortmund's Mahmoud Dahoud fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Sancho made the breakthrough in the 66th on a counterattack after a Gladbach corner. Nico Schulz intercepted a Florian Neuhaus pass and played the ball forward through Erling Haaland and Marco Reus, who sent Sancho on his way. The England forward fired in off the left post.

Moenchengladbach's Ramy Bensebaini, right, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Ramy Bensebaini, right, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Dortmund midfielder Mahmoud Dahoud, one of several players facing their former team, was sent off in injury time with his second yellow card for a dangerous lunge at Ramy Bensebaini, who was booked for his reaction. Dahoud will miss the semifinal.

Reus, the Dortmund captain, also previously played for Gladbach, as did substitutes Schulz and Thorgan Hazard, while Gladbach’s Matthias Ginter and Jonas Hofmann previously played for their opponents.

It was Gladbach’s fourth straight defeat across all competitions and it stretched to its winless run to six games – Rose’s worst stretch as a coach.

Moenchengladbach's Ramy Bensebaini, left, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Ramy Bensebaini, left, and Dortmund's Marco Reus fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Both sides missed good chances to score. Marcus Thuram should have scored early for Gladbach before Reus replied with another wasted opportunity at the other end.

Dortmund suffered a blow in between with Raphaël Guerreiro going off injured. The Portuguese wing-back was lying down with his left shin-guard off after just three minutes played.

The next big chance fell to Haaland, but Nico Elvedi got back and somehow did enough to just put the young star off in the 36th.

Moenchengladbach's Christoph Kramer, right, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Christoph Kramer, right, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Thuram had a goal ruled out for offside before the break, and Haaland had another ruled out through VAR after it. Replays showed the Norwegian caught Bensebaini, causing him to fall, before he swept in Reus’ cross.

More chances went untaken after Sancho scored.

Defender Stefan Lainer came closest for Gladbach when he fired just over with the final kick of the game.

Moenchengladbach's Stefan Lainer, left, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Stefan Lainer, left, and Dortmund's Erling Haaland fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

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Moenchengladbach's Marcus Thuram, left, and Dortmund's Emre Can fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram, left, and Dortmund's Emre Can fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram, left, and Dortmund's Mateu Morey fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram, left, and Dortmund's Mateu Morey fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram gestures after a missed opportunity on goal during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Marcus Thuram gestures after a missed opportunity on goal during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Jonas Hofmann, left, and Dortmund's Mahmoud Dahoud fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)

Moenchengladbach's Jonas Hofmann, left, and Dortmund's Mahmoud Dahoud fight for the ball during the German Soccer Cup quarter final match between Borussia Moenchengladbach and Borussia Dortmund at Borussia Park, Moenchengladbach, Germany, Tuesday, March 2, 2021. (Federico GambariniPool photo via AP)