The USA won the first Athletics World Cup as Great Britain came third at the London Stadium.
America took the crown by 57 points ahead of Poland and Great Britain, who finished on 155 points - seven behind second spot- on Sunday.
GB would have claimed second had they not been disqualified from the men's 4x400m - the final event - and finished ahead of Poland after a last-minute injury left them with just three runners.
The USA were the overnight leaders and comfortably took the crown, with athletes winning points for their country in each event as they competed for a £1.5million prize pot.
The USA banked £370,000, which is split evenly between the squad, while Great Britain won around £264,000.
IAAF president Lord Coe hopes the format will eventually be a success, despite the sport's top stars not taking part in the inaugural edition in London.
"I've been very clear that I want new things to be tried," Coe said. "They are not always going to work out from the word go but that can't inhibit us from going 'we tried, it didn't do everything so we go back to the same old thing.'
"They've already had interest in this from other cities."
Dai Greene, world champion in 2011, came third in the 400m hurdles having overcome an injury nightmare which has seen him barely run in the last five years.
He heads to Berlin for the European Championships next month pleased to have the chance to compete in Germany.
"To have exposure to big meets like this is a great treat for me given I've only raced a limited number of time this year," he said.
"It's a nice reminder of the better seasons I've had in the past and it's nice to be able to build for Berlin.
"I don't think it's necessarily possible this year (to win a medal), I think I've missed too much training to be pushing the best guys in Europe but my ambition is to get to the final.
"I still know I'll have to run a big season's best between now and then. It's a high enough ambition for now to aim for. I love what I do so I'm not going to hang it up at this point of my career."
Nick Miller came second in the hammer with 76.14m, behind Poland's Wojciech Nowicki.
The GB women won the 4x100m relay, Morgan Lake came second in the high jump with a clearance of 1.93m while Ojie Edoburun was fourth in the 100m.
Rabah Yousif was fourth in the men's 400m, Adelle Tracey was second in the women's 800m and Beth Dobbin was third in the 200m.
Dobbin, who will go to Berlin next month, said: "I had to pinch myself. It's been like a dream come true. I'm just trying to not let it get to me. I'm going back onto training before Europeans and hopefully I'll get my best performance."