Defending champions England swept to 4x100m relay gold as Ojie Edoburun anchored home a slick display.
Edoburun, who was called up to the team after Reece Prescod was forced out with injury, finished clear of Trinidad and Tobago in 38.35 seconds.
Jona Efoloko, 22, was preferred to Adam Gemili on the opening leg, with Zharnel Hughes and Nethaneel Mitchell-Blake impressing in the middle of the race.
England’s women took silver behind Nigeria in the women’s version.
Led off by Asha Philip, Imani Lansiquot and Bianca Williams delivered the baton into the final 100m with ground to make up on Nigeria.
Anchor Daryll Neita briefly threatened to reel in Nzubechi Grace Nwokocha as the crowd sensed a dramatic comeback, but England ran out of track.
Nigeria won in 42.10, 0.31secs ahead of the hosts.
