Robert Lewandowski's added-time goal earned Bayern Munich a 1-1 draw at Hertha Berlin on Saturday.
Mainz brought a run of four games without a win to an end with a 2-0 victory over Augsburg at the Coface Arena.
Bundesliga leaders Bayern Munich saw their winning run come to an end as Schalke battled to a 1-1 draw at the Allianz Arena.
Danny Latza headed a late equaliser as Mainz clinched a 1-1 home draw against Borussia Dortmund in the Bundesliga.
Stoke forward Bojan has joined German side Mainz on loan until the end of the season.
Hakan Calhanoglu scored twice as Bayer Leverkusen beat Hertha Berlin 3-1 on Sunday to move up to eighth in the Bundesliga.