Bayern Munich lead the Bundesliga by 11 points after a 2-0 win over Hertha Berlin, who drop below Borussia Monchengladbach.
Hertha Berlin stay fourth in the Bundesliga after securing a narrow 1-0 win over Hoffenheim.
Wolfsburg slipped 13 points behind Bundesliga leaders Bayern Munich as they were beaten 2-0 at Mainz on Saturday.
Borussia Dortmund and Wolfsburg both made inroads into Bayern Munich's advantage at the top of the Bundesliga with wins on Saturday.
Hoffenheim have appointed 28-year-old Julian Nagelsmann as manager from next season, but who is the Bundesliga's youngest-ever boss?
Hoffenheim have sacked coach Markus Gisdol and named veteran Huub Stevens as his successor.