Bayern Munich restored their nine-point lead at the top of the Bundesliga with a routine 3-0 win at Arminia Bielefeld to leave themselves on the brink of a 10th straight title.
Julian Nagelsmann's side were knocked out of the Champions League by Villarreal in midweek, leaving the Bundesliga as the only trophy they can claim this season.
Borussia Dortmund reduced the gap to six points with a thumping 6-1 win over Wolfsburg on Saturday.
However, Bayern ensured they will go into Der Klassiker against Dortmund with a comfortable buffer, goals from Robert Lewandowski and Serge Gnabry, both of which were originally disallowed for offside, and some late gloss courtesy of Jamal Musiala means they can secure the title by beating their fierce rivals next time out.
Arminia started brightly and the impressive Patrick Wimmer fired into the side-netting after cutting in from the right.
But Bayern soon took control of the contest, with only an astonishing save denying Robert Lewandowski as Stefan Ortega Moreno pushed his close-range header onto the post and then off the underside of the crossbar.
Lewandowski then looked to have been thwarted by the offside flag after he met Alphonso Davies' cross and saw his effort deflected in by a defender, however, the VAR overturned the decision to give Bayern lead.
Ortega's battle with the Poland striker continued as he repelled another effort after more good work from Davies as Bayern piled further pressure on the Arminia goal.
Arminia then saw two more offside decisions go against them as a well-taken Masaya Okugawa goal was chalked off in a decision confirmed by VAR before Gnabry found the bottom-left corner with a first-time strike that was awarded after originally being disallowed by the linesman's flag.
Bayern took the sting out of a low-key second half with little difficulty and Musiala tapped in at the near post six minutes from time to put the result beyond any doubt.
What does it mean? Bayern a win away from title
Der Klassiker is always a massive date on the German football calendar but it will have extra significance next Saturday.
Nine points ahead of Dortmund with four games remaining, a home win over their arch-rivals will seal yet another title for Bayern.
Power Serge
Gnabry was at the heart of Bayern's dominance here, providing four key passes to go with his goal.
Arminia running out of games
Defeat for Arminia means they have taken just one point from their last seven games and are two points adrift of the relegation play-off spot.
What's next?
There could be a celebration at the Allianz Arena next Saturday, a day that will also see Arminia visit Cologne.