FC Barcelona defeated FC Bayern 4-1 in another show of strength of Flick's team with Brazilian attacker and captain Raphinha marking a hattrick.
Harry Kane levelled after Barca's first-minute opener for his fifth goal of the campaign but was helpless as his team collapsed to their second defeat in three Champions League outings.
"In my opinion this game could have been a (Champions League) final, to be able to win it in this way, so well, in front of our fans, is quite special and I leave here happy," Raphinha told Movistar.
The result leaves Bayern in the bottom half of the table, while Barcelona have two wins and are 10th.
Raphinha sent the hosts on their way at the Olympic Stadium inside 60 seconds, tucking home after rounding goalkeeper Manuel Neuer.
Kane levelled in the 18th minute with an acrobatic volley from a Serge Gnabry cross.
Ex-Bayern player Lewandowski then restored Barca's lead in the 36th minute by pouncing on a loose ball after Fermin Lopez had snuck behind the visiting defence.
Raphinha got his second on the stroke of half-time with a curling effort off his right side.
The Brazil international's third on 56 minutes showcased Barca's danger on the counter as he galloped onto a swept pass from Lamine Yamal before arrowing home a left-footed finish with both centre-halves trailing in his wake.
Harry Kane levelled after Barca's first-minute opener for his fifth goal of the campaign but was helpless as his team collapsed to their second defeat in three Champions League outings.
"In my opinion this game could have been a (Champions League) final, to be able to win it in this way, so well, in front of our fans, is quite special and I leave here happy," Raphinha told Movistar.
The result leaves Bayern in the bottom half of the table, while Barcelona have two wins and are 10th.
Raphinha sent the hosts on their way at the Olympic Stadium inside 60 seconds, tucking home after rounding goalkeeper Manuel Neuer.
Kane levelled in the 18th minute with an acrobatic volley from a Serge Gnabry cross.
Ex-Bayern player Lewandowski then restored Barca's lead in the 36th minute by pouncing on a loose ball after Fermin Lopez had snuck behind the visiting defence.
Raphinha got his second on the stroke of half-time with a curling effort off his right side.
The Brazil international's third on 56 minutes showcased Barca's danger on the counter as he galloped onto a swept pass from Lamine Yamal before arrowing home a left-footed finish with both centre-halves trailing in his wake.
