Borussia Dortmund won their fifth German cup thrashing RB Leipzig. Photo courtesy: Twitter/Borussia Dortmund

Erling Braut Haaland and Jadon Sancho scored braces as Borussia Dortmund outplayed RB Leipzig 4-1 to lift the German Cup for a fifth time.

In a blistering first-half display, Dortmund scored three goals to put themselves in firm control against the team sitting two spots above them in the Bundesliga.

English international Sancho opened the scoring before Haaland made it 2-0 inside 30 minutes of the pulsating match took place in the German capital Berlin.

Sancho added his second in the first-half stoppage time, while Haaland completed the route late after Dani Olmo pulled one back for Leipzig.

Julian Nagelsmann, who is leaving Leipzig to join rivals Bayern Munich next season, had been hoping to sign off his remarkable term with the German side with a deserving trophy.

But the star players stepped in and put a complete performance to give Dortmund, who are not yet sure of a champions league place, their major silverware in the season.

Haaland’s second was his 39th goal of the season from as many games.

Dortmund's embattled Edin Terzic became the youngest manager to win the German Cup after Thomas Schaaf achieved this remarkable fete for Werder Bremen in 1998-99.

Dortmund who also beat Leipzig 3-2 last week, climbed to fourth place in the Bundesliga with just two games remaining.