The USA coach called for focus from his players before they play Portugal at the Arena Amazônia, Manaus, on Sunday.
USA head coach Jurgen Klinsmann says his side must have 'total focus' on their upcoming Group G fixture against Portugal.
Klismann's men got off their World Cup campaign off to a great start with a thrilling 2-1 win over Ghana, but the German says they must now look ahead to their next test.
"Our total focus is on Portugal now," Klinsmann said. "Ghana is far away from us already so it's out of our minds."
"We knew it was very, very important to get those three points, we worked hard for it. It was a very tricky game, but our mindset is 100 per cent on Portugal."
Portugal will be fighting for their World Cup lives in Manaus on Sunday, after their 4-0 drubbing at the hands of Germany. They now sit bottom of the group and will almost certainly need to win their remaining games to qualify for the later stages of the competition.
Klinsmann is wary of the threat posed by a wounded Portuguese team.
"It's a difficult situation for them now after that 4-0 defeat, they are with their backs against the wall," he said. "So that makes it even more difficult to get a result."
"But that's what you want, that's what the World Cup is about. We also have the chance with a win to hopefully qualify already. It can't get any better."
Portugal's captain and talisman Cristiano Ronaldo was kept quiet against Germany. Ronaldo, who typically comes alive on the big stage, will be a huge threat for the United States to deal with on Sunday.
If they are able to contain the Real Madrid man and get a result against Portugal, the USA may secure an unlikely escape from the so-called 'group of death'.