Schalke consolidated second spot and guaranteed their Champions League place for next season with a 2-1 triumph at Augsburg.
Freiburg sporting director Jochen Saier insists there has been no contact with Arsenal over the potential transfer of Turkish defender Caglar Soyuncu.
Hamburg and Freiburg boosted their survival hopes but Cologne were relegated from the Bundesliga despite a dramatic late comeback.
Jadon Sancho became the youngest Englishman to score in Bundesliga history as he starred in a 4-0 Borussia Dortmund win.
Mainz benefited from a bizarre penalty decision which helped to seal a controversial 2-0 victory over fellow strugglers Freiburg.
Mainz and Freiburg players were hauled back to the pitch after the referee had blown for half-time when a penalty was belatedly awarded via VAR.
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