Flamengo pulled off a stirring second-half comeback to swipe aside Chelsea and keep up the Brazilian team's impressive start at the FIFA Club World Cup.
After Pedro Neto had put the Blues into the lead thirteen minutes in the game, it looked very much like Chelsea had a controlled victory on their hands.
However, in a dramatic sequence of events on the hour mark, Flamengo turned the game on its head and stunned Enzo Maresca's side.
Two goals in three minutes saw Chelsea lose both their game and their heads, as they were reduced to ten men following Nicolas Jackson's silly red card.
Flamengo then added a third late on to really rub salt in the wounds and to cement their place at the top of Group D.
Here are the key talking points from an enthralling afternoon in the Philadelphia sunshine.
A very obvious trend is emerging in the FIFA Club World Cup, and it's that the Brazilian teams are not here just to make up the numbers - they mean business.
Much had been made about how seriously the South American teams had been speaking of the competition in the build-up to the tournament and we're now seeing it come to fruition.
Hot on the heels of Botafago's shock win over PSG, Flemango continued the country's unbeaten run in the States with a stunning second-half display against Chelsea.
At the break, there looked like only one side in it after Pedro Neto had put the Premier League side ahead and they had controlled most of the first half.
However, Flamengo's desire, drive and determination saw them overpower Chelsea and turn the game on its head with two goals in three minutes.
With a clever blend of experience and youth, as shown by the three goal scorers, Flamengo seem to have arrived in the USA in good shape, and it continues the same example we're seeing from all the Brazilian sides.
Yes, they may be more in tune having come into the tournament midway through their domestic season, but it's a tune they've still got to play louder and harder against Europe's elite. And they are proving they can do it.
Against LAFC, Nicolas Jackson started as Chelsea's focal point in attack. Against Flamengo, it was Liam Delap. Clearly, Enzo Maresca is giving both the chance to take the shirt ahead of next season, but how are each fairing?
After both notched an assist in the opening game against LAFC, Delap started in Philadelphia and nearly marked the occasion with goal inside the first five minutes. Motoring on to a through ball on the right flank and stinging the goalkeeper's hands with a decent effort at the near post.
That was the striker's only real sight of goal during the hour he had on the pitch, but he did show glimpses of some neat link-up play with Pedro Neto and some of the archetypal 'big man up front' strength that he has in his locker.
As for Nicolas Jackson, well, it's hard to judge his four minutes on the pitch after he was sent off just moments after coming into the game following a reckless lunge on Flamengo's Aryton Lucas.
His suspension means there'll be more time for Delap to impress and stake his claim to be the first choice in Chelsea's attack.
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While the afternoon ended in a pretty resounding defeat for Chelsea, one shining light from the game was Pedro Neto.
The Portuguese was easily the Blues' best player, particularly in the first half, and could well be the name Mareca builds his attack around next season.
Not only for his goal, which he took coolly and calmly after winning it in midfield, but every spark came through him - especially in the first half.
There were also early signs of an understanding with Liam Delap, too, something that could really grow into an asset for this Chelsea team ahead of the new campaign.