RB Leipzig reached the German Cup semi-finals after battling past in-form VfL Wolfsburg 2-0 on Wednesday.
VfL Wolfsburg cruised past struggling Arminia Bielefeld 3-0 with two goals from Swiss international Renato Steffen on Friday.
Wolfsburg were held to a 0-0 draw by Borussia Monchengladbach on Sunday as their four-match winning run in the Bundesliga came to an end.
VfL Wolfsburg battled their way past Schalke 04 1-0 on Wednesday to reach the German Cup quarterfinals.
VfL Wolfsburg cruised to a 3-0 home win over Freiburg on Sunday to move into third place in the Bundesliga with their third straight win.
RB Leipzig missed the chance to go top of the Bundesliga after drawing 2-2 at Wolfsburg on Saturday to stay a point behind Bayern Munich.
"We will not start chasing our players and ask them whether their wives are barbers," a Union Berlin spokesperson said.
The German Hairdresser Association has asked the German Football Association (DFB) why footballers have taken to the pitch with fresh haircuts.
Jadon Sancho scored his first Bundesliga goal of the season as Borussia Dortmund returned to the top four with a 2-0 victory over VfL Wolfsburg.
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