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Video - USA defeat Germany to reach semis
Favourites the United States beat Germany to move through to the last four of the men's beach volleyball.
Todd Rogers and Phil Dalhausser won 21-13 25-23 and next face Georgia's Renato Gomes and Jorge Terceiro, who beat the Netherlands 21-19 21-19.
The second semi-final will be an all-Brazilian encounter.
Defending champions Ricardo Santos and Emanuel Rego beat USA's Sean Rosenthal and Jake Gibb 21-18 21-16, setting up a tie with Marcio Araujo and Fabio Luiz.
Araujo and Luiz beat Florian Gosch and Alexander Horst of Austria, 22-20 21-17.
US pair Rogers and Dalhausser progressed after the Germans were penalised a point for delay of game in the second set.
That put the US 9-8 ahead but even the beneficiaries were unhappy about the umpire's decision.
"I didn't like it. In a situation like this, a heated contest... it's just not the right thing," said Rogers.