The podium in the Olympic men's rugby sevens competition will feature at least one new team after Argentina stunned 2016 bronze medallist South Africa.
Somehow, they did it while finishing with only five men, clinging on for a 19-14 victory despite having Gaston Revol sent off in the first half for a high tackle, and then Lautaro Bazan Velez sent to the bin in the closing stages for a deliberate knockdown.
But just as it looked sure that South Africa were going to be able to get out of jail, Argentina managed to win possession and frantically kick the ball into touch to spark wild scenes and seal a semifinal berth.
They will play defending champion Fiji in the semifinals, while 2016 silver medallist Great Britain take on the All Blacks sevens after remarkably rallying from a 21-point deficit to edge the United States.