USA head coach Bob Bradley says he understands the importance of his team doing well on the international stage.

Bradley's men are on the verge of qualifying for the World Cup Round of 16 but need to defeat Algeria in Pretoria on Wednesday and the boss is aware of the magnitude of this match and how it may reflect on the sport back home.

"Soccer in the United States continues to grow, there's been so many important steps along the way," he said.

"We understand that each World Cup takes on extra importance, and we understand the responsibility as a team of representing the United States and representing our sport."