It was the worst European night in Tottenham Hotspurs history at their new stadium in London as Bayern Munich left a sour taste in the mouth with a 7-2 drubbing.
Former Arsenal midfielder, Serge Gnabry scored four second half goals in 35 minutes to leave Spurs rooted at the bottom of Group B with only one point.
Spurs had taken an early lead in the 12th minute through Heung-Min Son before Joshua Kimmich restored parity for the German visitors three minutes later.
Lewandowski ensured Bayern took a first half lead into the break before they ran riot in the second half.
Harry Kane had scored from the penalty spot, but it did little to reduce the humiliating deficit.