bundesliga.com summarises the top statistics after another exciting round of action from Germany's top division.
Leverkusen's impressive run of eleven games unbeaten came to an end on Matchday 4, with a 2-0 loss away to FC Schalke 04. Their last defeat also came against a Champions League participant, after ending up on the wrong side of a 2-1 scoreline against FC Bayern München in mid-March.
Eintracht Braunschweig became only the third newly-promoted side to lose their opening four games of a Bundesliga campaign. The last time this occurred was in the 2007/08 season with Hansa Rostock, who were relegated. Braunschweig will have to improve to ensure the same fate does not befall them.
Last season, Hakan Calhanoglu scored a remarkable seven direct free-kicks - and his first in the Bundesliga shot Hamburger SV to their highest win under Thorsten Fink. The Bundesliga's only ever-present club marked their 1,700th game in the top division with their 702nd win - there have been 459 draws and 539 losses.
Braunschweig may be ruing their bad fortune at the start of the season, but Hannover 96 are delighted with theirs. This is the first time for 48 years that the club from Lower Saxony have begun the season by winning three of their first four games. Saturday's 4-1 was their biggest win of the season, and their third consecutive home success.
The 100th goal of the current campaign was scored by Borussia Mönchengladbach's Raffael - showcasing the Bundesliga's exciting, attacking football. More goals followed in the highest-scoring game of the season thus far, as VfB Stuttgart beat 1899 Hoffenheim 6-2 with Vedad Ibisevic scoring the second hat-trick of the season.
Nicolai Müller scored his fifth goal of the season against Hannover 96, as he finished Matchday 4 joint top of the scoring charts - he has now scored four times in four matches against the Reds. The last player to score five goals in the opening four Bundesliga fixtures was Halil Altintop of 1. FC Kaiserslautern in 2005/06.