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Tyler Miller USA Jersey . -- Arizona raced out to a big lead and did not back off, hitting the accelerator instead.RIO DE JANEIRO -- In the last three Olympics it was a semifinal matchup, the penultimate step on the winners climb to the gold-medal podium.Now the U.S. mens basketball team meets Argentina in the quarterfinals, and the stakes couldnt be clearer.The Americans win, or suffer their greatest Olympic failure ever.The Argentines win, or say goodbye to their Golden Generation.Manu Ginobili and Luis Scola did the punching when the U.S. was knocked down to its lowest point 12 years ago, and the Americans, whove handled them every time since, expect their proud opponents to have one last good fight in them.Guys like that, theyve been together and so well-coached and theyve helped international basketball take giant steps forward, and we know thats what were playing on Wednesday, U.S. coach Mike Krzyzewski said.Its the third game of quarterfinal Wednesday, which opens with Australia playing Lithuania. Rivals France and Spain play next -- with the winner getting the U.S.-Argentina winner -- and Croatia faces Serbia in the nightcap.Any of those teams should believe in its chances after the Americans were challenged like never before under Krzyzewski in the preliminary round, winning their last three games by 10, three and three points.Its a far cry from last month, when the U.S. beat Argentina 111-74 in an exhibition game in Las Vegas, back when even rival teams seemed to be conceding gold to the Americans.Nobody is doing that now.When we played them a month ago, I said what I thought it was. We werent there, we couldnt compete, Scola said. A month went by, I dont know, maybe they didnt play that well this month, they got a little comfortable and play a little worse. Maybe we got better this month and the difference is much smaller. Maybe.Its just one game, anything can happen. But we dont think its going to be easy.Nor do the Americans, still thinking of what Argentina used to be, instead of the team it is now.Ginobili is 39 and Scola 36, almost certainly playing in their last Olympics, and the aging Argentines looked out of gas Monday when they were blown out by Spain, two days after needing two overtimes to outlast Brazil 111-107. They lack size to match the Americans tandem of DeMarcus Cousins and DeAndre Jordan -- the 6-foot-8 Scola often has to play centerr -- and at times in the exhibition rout it appeared the U.ddddddddddddS. could keep grabbing offensive rebounds until it finally scored.But inside Carioca Arena 1, which has been filled with so much light blue and white during Argentinas games that it resembles clouds in the sky, the Americans believe their undersized opponents will stand tall.They match up with anybody in that they will put their heart, their soul and their bodies out on the court against you, and anybody that does that has a chance to win, Krzyzewski said. And Ive never seen an Argentina team go on the court not thinking that they could win and we expect that from them.The U.S. teams that won gold in 2008 and 2012 overpowered Argentina in the semifinals, but those teams were loaded with All-NBA players. This is just an NBA team, not an All-NBA one, not after players such as LeBron James, Stephen Curry and Russell Westbrook stayed home.Thats left these Americans looking more like 2004, when they scrambled to put together an unprepared team that didnt have much of a talent advantage on its opponents. The U.S. was beaten 89-81 in the semis by Argentina, which then beat Italy for the championship, earning its Golden Generation nickname.Carmelo Anthony, in his fourth Olympics, remembers watching part of the gold-medal game with the Americans, who had to hang around to collect their bronze medals.It was just hard to watch, he said. That was a moment where we expected to kind of be at. We werent there. We werent the champions of the world at that point in time.That third-place finish matched the Americans worst at the Olympics, one of only three times in their 17 appearances they didnt win gold.Lose Wednesday, and they watch Argentina celebrate again -- and this time leave an Olympics empty-handed for the first time.They can shoot and theyre playing with confidence. But at the end of the day, its about us, U.S. forward Kevin Durant said. I understand were playing against Argentina and we respect them, but its about how we come out.---AP Sports Writer Tom Withers contributed to this report.---Follow Brian Mahoney on Twitter: http://www.twitter.com/Briancmahoney ' ' '