Skipper Richard Staple insisted the USA had gained valuable experience in their 210-run Champions Trophy defeat by New Zealand at The Oval.
"If I say we weren't nervous, I'd be lying. But once we got the feel of it we were OK.
"We met our expectations and I thought we did reasonably well under the circumstances," Staple commented.
"It was always going to be tough chasing 347, but our guys went out and did their best."
Staple's side competed well in the field until an unbroken stand of 136 in eight overs between Nathan Astle (145 not out) and Craig McMillan (64) pushed New Zealand's total out of reach.
"We wanted to come out and play hard and well. I thought, for the most part, we did that.
"But we were a bowler short, and that made it hard to contain guys who were already settled," he said.
The USA have an even tougher task facing them in their second game when they face Australia, the world's top ranked one-day side.
The USA could only muster 137 all out in reply
"Against Australia it will obviously be a real challenge but it's something we have to do and give it our best.
"It will be a daunting match as they are the champions and they are playing great cricket right now," he said.
"It's going to be tough, but we'll do the best we can and come out on a positive note.
Staple hopes that by competing in such a prestigious competition, the team will help raise cricket's profile in his country.
"Soccer started off in a similar light. America were beaten by top teams, but now they are ranked in the world's top 10.
"I'm sure America understands we are getting our feet wet in the international arena and they'll need to be patient with us."