Mueller scored either side of Lewandowski’s double, with the Polish striker taking his season’s tally to seven league goals from four games, as Bayern moved to nine points, level with third-placed Borussia Dortmund and one behind leaders RB Leipzig, who won 2-0 at Augsburg.
“The first half was very near to what we see as perfect football,” Bayern coach Hansi Flick said of his team’s strong first half. “But at times we have to be more clever to save energy.”
Bayern, who also twice hit the woodwork, have a busy schedule, having played in the German Cup and league this week and next facing Atletico Madrid in the Champions League on Wednesday.