Arsenal's academy boss Andries Jonker has left the club to become Wolfsburg's new head coach.
Serge Gnabry scored twice as Werder Bremen climbed out of the relegation play-off spot with a 2-1 Bundesliga win at Wolfsburg.
Robert Lewandowski's added-time goal earned Bayern Munich a 1-1 draw at Hertha Berlin on Saturday.
Hoffenheim stumbled to a 2-1 defeat at Wolfsburg on Sunday as all six clubs chasing Bayern lost over the weekend.
Bundesliga leaders Bayern Munich saw their winning run come to an end as Schalke battled to a 1-1 draw at the Allianz Arena.
Everton have signed Germany U20 forward Anton Donkor on loan from Wolfsburg until the end of the season.