It was a day of niggly encounters in Germany as three of Saturday's Bundesliga fixtures saw red cards.
Bayern München recovered from dropping two points last weekend by thrashing VfB Stuttgart 4-0 in the Bundesliga on Saturday.
Arjen Robben (11'), Doulgas Costa (17'), Robert Lewandowski (37') and Thomas Muller (40') all netted in the first half to ensure the game was only going to go one way.
The defending Bundesliga champions took their foot off the pedal in the second period, but still had a couple of good opportunities to add to their advantage as first Lewandowski in the 65th minute, then Robben in the 71st, were denied by a much-improved Stuttgart defence.
Borussia MG struggled to a disappointing 0-0 draw with FC Ingolstadt after Granit Xhaka saw red in the 86th minute for two bookable offences.
Mainz 05 made the most of their man advantage, after Julian Draxler was sent off in the 13th minute for a dreadful tackle, to beat VfL Wolfsburg 2-0 thanks to goals from Pablo de Blasis and Jairo Samperio.
Frankfurt were unable to find a breakthrough against TSG Hoffenheim, despite registering more than twice as many attempts on goal as their hosts, and the match ended 0-0.
Ten-man Leverkusen succumbed to a 2-1 loss to 1. FC Köln at home after Kyriakos Papadopoulos was sent off in the 53rd minute.
Dominic Maroh gave the visitors the lead in the 17th minute only for Chicarito to bring Leverkusen level a quarter of an hour later.
Papadopoulos was sent off early in the second half for tripping Anthony Modeste when the striker was through on goal and Köln took full advantage, grabbing a deserved winner through Maroh's second of the game in the 72nd minute.
In the day's late match, Darmstadt and Hamburger SV played out to a 1-1 draw after goals from Pierre-Michel Lasogga and Marcel Heller cancelled each other out.
Despite holding the advantage throughout much of the first half, Darmstadt found themselves behind as Lasogga struck from the penalty spot in the 29th minute.
However, they were back on level terms two minutes after half time as Heller latched onto a beautiful lofted pass from Jerome Gondorf to head home and make it 1-1, which is how it stayed,