Braces from Maximilian Philipp and Pierre-Emerick Aubameyang ensured Dortmund went to the top of the Bundesliga table as they beat Cologne 5-0.
Dortmund went top with a 5-0 win over Cologne, while Hertha denied Hoffenheim the chance to move level on points with the leaders.
Stuttgart captain Christian Gentner is expected to make a full recovery after breaking his lower and lateral eye socket, nose and upper jaw.
Bayern Munich striker Robert Lewandowski has refused to comment on the latest speculation linking him with Real Madrid.
Robert Lewandowski netted twice on his 100th Bundesliga game for Bayern Munich as they beat Mainz 4-0.
Carlo Anceloti's midweek changes from Champions League proved fruitful, while Thomas Muller, Arjen Robben and Robert Lewandowski led the charge.