Jessica Beard ran a fast first turn to close the door on Janieve Russell to give USA the lead at the break.

Holding a 5 metre lead, Obi Igbokwe ran strong as Martyn Rooney for GBR, Javon Francis for Jamaica and Abubaker Abbas for Bahrain all closed the gap on the home stretch.

From the gun, Wilbert London took the early lead with Muhammed Anas putting India into second position, making up the stagger on Musa Isah from Bahrain.

Iga Baumgart-Witan took the baton with a 50 metre lead for Poland with USA's Courtney Okolo ahead of Jamaica's fresh legs Tiffany James in hot pursuit.

On the final turn of the leg, Okolo's 49.9 separated from James as Poland's lead shrunk slightly while again Eid Naser was running Bahrain back into contention.

Święty-Ersetic was able to hold the other teams off until the home stretch but then Jamaica, Bahrain and at the line GBR passed her with Abbas diving in vain at the finish to try to catch Francis for silver before crashing to the track.