Freiburg picked up a crucial win in their battle against relegation with a 2-0 victory over Augsburg.
Augsburg's hopes of playing in Europe next season suffered a setback as they were beaten 2-0 at home by Mainz.
Augsburg got their push for a place in Europe back on track by becoming the first side to beat Wolfsburg in 2015.
A last-gasp Salomon Kalou strike earned Hertha Berlin all three points in a 1-0 win over Augsburg.
Augsburg goalkeeper Marwin Hitz scored a dramatic late equaliser to earn his side a 2-2 draw at home to Bayer Leverkusen.
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