COMMENT: The Ballon d'Or winner continues to struggle for fitness, and despite his stunning cross helping to keep his side in the World Cup, it is a stay of execution
Five minutes in, when Cristiano Ronaldo pulled three dummies out of the bag and then beat another man with some delightful footwork, it looked like the people of Manaus were in for the footballing exhibition they had been waiting for since December.
It took until the very last minute for Ronaldo, almost down and out, to live up to that early excitement and prove his enduring quality on what had been a long and testing night.
His right-wing cross for Silvestre Varela to head home at the death keeps his team alive, for now at least. The pressure placed on his shoulders, inadvertedly by his team-mates and purposely by the locals here in the Amazon, almost looked too much for him.
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But between the fifth minute and the 93rd, it had been a patchy, cautious performance from the world's best player. It would be remiss, though, to criticise him too harshly; he did about as much as the conditions allowed.
Firstly, his knee is clearly not ready. After showing off his fitness to the press in open training at the Arena da Amazonia on Friday night, you got the impression that he was finally about to arrive at the 2014 World Cup following a poor outing against Germany.
But while he can still produce stunning exhibitions of trickery and speed which 99 per cent of the planet could never hope to match, he cannot do the things which have made him arguably the best player in the world. For the vast majority of this match, this was not Ronaldo.
He completely abandoned his position on the left and offered his full-back, first Andre Almeida and then Miguel Veloso, no cover whatsoever. In attack it appeared he was not up to the explosive bursts of pace which have torn teams across Europe to shreds for the past five or six years.
Secondly, his attacking team-mates barely offered him anything. Aside from the opening goal, Nani was at his wasteful worst. Eder, an early replacement for the injured Helder Postiga, was too weak and not inventive enough to carve out openings through the middle. This Portugal side without Ronaldo at full tilt have been brutally exposed for how average they truly are.
The defence were dogged - never moreso than Ricardo Costa's remarkable goal-line clearance - but eventually they caved in, conceding twice, only to be bailed out once again by their captain.
The States, of course, must also take credit for shackling the Ballon d'Or holder. They deserve credit for the attitude, effort, commitment and belief which will characterise their tournament, however far they go.
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This could have been the last we saw of him in Brazil: if reports over the extent of his knee injury are accurate, he may well have been rested for a dead rubber against Ghana. Real Madrid may be cursing their luck that the Seleccao are just about still fighting, and Ronaldo will be at the forefront.
He and his side are still likely heading home early: a point between the States and Germany, coach Jurgen Klinsmann's homeland, will see both teams through.
But for now it is enough for Portugal to fight on, just as Ronaldo had done all night. Plenty of Americans left the stadium in tears, and thousands more locals may well be disappointed they did not see the best of Cristiano Ronaldo. But he did everything in his power.