Neymar on target as Brazil beat Argentina

The 19-year-old Sao Paulo forward Lucas capped off an exhilarating run from Brazil's own half with a well-placed shot nine minutes after the break.

Neymar added the second for the hosts in the 76th minute from close-range after a low cross from the left from substitute Diego Souza to thrill home fans in the Amazonian city.

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"It's wonderful to play with Neymar and Lucas, the young talents... I was called here for that, to give support to these young people," Ronaldinho told reporters, adding that he was targeting a spot on the team for the London Olympics next year as one of the three permitted over-23 players.

"I go step by step, my dream now is to win the Olympic gold that is missing in my career, and then get really well in the 2014 World Cup," he added.