Life in Bundesliga 1 began in silence for Union Berlin on Sunday, with a 15-minute protest by their fans against opponents Leipzig - a "constructed club", according to a supporters' group. Red Bull-backed Leipzig have been unpopular among rival fans since the club's formation in 2009.
A minute after Union fans finally unleashed their support, it was the visiting supporters making all the noise after Leipzig scored the opening goal in a 4-0 rout of the first team from what was East Berlin to play in Germany's top flight.
Marcel Halstenberg's 16th-minute opener was followed in the first half by more from Marcel Sabitzer and Timo Werner in the 31st and 42nd minutes, respectively. Substitute Christopher Nkunku marked his debut with a goal in the 69th, underlining the gulf in quality between sides that finished third in their respective divisions last season, and giving Julian Nagelsmann a winning start in his first league game in charge of Leipzig.