Bayern Munich were held to a 1-1 draw at Union Berlin on Saturday, giving defending champions Bayer Leverkusen an outside chance of dragging themselves back into the Bundesliga title race.
Bayern Munich are eight points ahead of second-placed Bayer Leverkusen, with ten games to go in the Bundesliga season.
Bayer Leverkusen manager Xabi Alonso has never lost to Bayern Munich, with three wins and three draws in six meetings.
Bayern Munich sit eight points clear on top of the Bundesliga table.
Bayer Leverkusen had 15 shots to Bayern Munich's two, but could not find a goal.
Bayer Leverkusen sit eight points behind Bundesliga table toppers Bayern Munich, ahead of their encounter.
Despite the defeat, Bayern are still four points ahead of second-placed Bayer Leverkusen.
Leipzig's 2-1 loss at Dortmund last week, their first in the league this season, has given Vincent Kompany's Bayern the chance to grow their lead at the top of the table.
The international break seems to have come at just the right time for Bayern Munich, allowing the 2020 treble winners a chance to regroup under head coach Vincent Kompany.
Bayern Munich had not lost a Champions League group game since 2017 until a 1-0 defeat to Aston Villa on Wednesday night.