The defeat also cost Mainz the leadership as they stayed behind Borussia Dortmund on goal difference. Both teams have 21 points from seven games after Borussia won 2-1 at Cologne to go top on Friday.

Mario Gomez scored a hat trick to give struggling champions Bayern Munich a 3-0 win over Hanover 96 and take them to 11 points. Bayern had scored only five goals in their first seven outings.

Schalke 04, last seasons runners-up, are 16th after being held to a 2-2 home draw by bottom club VfB Stuttgart, who fired coach Christian Gross last week.