Germany's top two teams have a much bigger trophy in their sights when they meet in the Champions League final on May 25 after brushing aside Spain's Barcelona and Real Madrid.
Bayern's 3-0 win at Barcelona for a 7-0 aggregate victory on Wednesday came a day after Dortmund eased past Real despite a 2-0 loss to set up the first all-German final in the competition.
"This thing with Bayern now is a funny constellation," said Dortmund coach Jurgen Klopp. "We will have to see how we can do it."
With Klopp's team facing their biggest game in 16 years at Wembley Stadium on May 25, the 45-year-old could be forgiven for putting the league derby on the backburner.
"We will give it everything we have, I can promise that. We have enough time to recover but if Bayern beat us [in the league on Saturday] then I do not think there will ever be fewer disappointed people in Dortmund," Klopp said.
"With Mario it will be tight for any game from now on," Klopp said of the talented offensive midfielder's chances of playing again this season.
"We will try to cause Bayern some problems but we will have to wait and see if it works."
"No, no, it is not pointless," Bayern coach Heynckes told reporters when asked if the upcoming league game against their rivals had any weight given the bigger date the two clubs have.
"But we will not start thinking about it before Friday. We will celebrate, enjoy this moment and from Friday onwards we can start thinking about it," he said after Bayern booked their third Champions League final spot in four years.
At the other end of the table Hoffenheim's five-year spell in the top division could be coming to an end with a defeat at fellow relegation-threatened Werder Bremen.
