Ukrainian Andrey Voronin, on loan from Liverpool, has been an invaluable pickup for Hertha. He scored his fourth goal in four games and Hungary midfielder Pal Dardai followed with a second goal to put Hertha 2-0 up at halftime. American Michael Bradley scored for Moenchengladbach from the penalty spot in the 69th minute.
Wolfsburg moved into fourth place, ahead of Bayern, thanks to its win over Hamburg. Brazilian Grafite led Wolfsburg with two early goals.
Tiny Hoffenheim could have moved back into a share of the lead but was held to a 0-0 draw by Borussia Dortmund.
Bayern had a man advantage for 75 minutes after Naldo was sent for fouling last man Bastian Schweinsteiger, but it couldn't score at Bremen.
"We have to accept the result as it is," said Bayern coach Juergen Klinsmann,