It was a night to forget for Mauricio Pochettino's side, who were utterly humiliated at their new stadium, but a night to remember for a certain Serge Gnabry.
The 24-year-old German spent four years at rivals Arsenal before joining Werder Bremen in 2016 for just £5m and then Bayern a year later.
Incredibly, Gnabry was determined as not good enough by Arsene Wenger and also Tony Pulis during his loan spell at West Brom.
Now look at him.
Gnabry scored four goals at the Tottenham Stadium in a breathtaking second-half performance. Robert Lewandowski (2) and Joshua Kimmich grabbed the other three.
Every shot taken by Gnabry was done so with devastating effect and Hugo Lloris could do nothing about them.
The Bayern winger was so good against Spurs, in fact, that he became only the 11th player in history to receive a perfect 10/10 rating from French newspaper L'Equipe.
Gnabry joins teammate Lewandowski, Lionel Messi and Neymar in being rated 10/10 by L'Equipe and he absolutely deserved it.
His four goals were all superb in their own way and you can watch them in the video below, courtesy of BT Sport.
What a performance. Arsenal fans will have enjoyed watching Gnabry destroy their arch rivals and he only rubbed things in on Twitter after the game.
Gnabry tweeted "North London is RED!", while Hector Bellerin messaged his former teammate saying "Joke man" with a bunch of laughing-crying emojis.
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