Borussia Dortmund leapfrogged Bayern Munich back into top spot in the Bundesliga following a 3-0 win at Hamburg on Wednesday.

Former Manchester United midfielder Shinji Kagawa struck from close range before the break, while Pierre-Emerick Aubameyang and Christian Pulisic added further goals in the second half.

Victory extends Dortmund's winning league start to five matches and lifts them one point above Bayern, who won 3-0 at Schalke on Tuesday night.

Hamburg, who opened their league campaign with successive wins, have lost their last three Bundesliga matches.