Britain's Fran Halsall helped Europe set a world best time but the United States wrapped up a convincing victory in the Duel in the Pool in Atlanta.
Halsall, Jeanette Ottesen, Aliaksandra Herasimenia and Ranomi Kromowidjojo won the 4x100m freestyle relay in 3 min 27.53 sec, faster than the Netherlands' world record of 3:28.22 set in 2008. It will not count as a world record because the swimmers were from different countries. The Americans won 22 of 30 events to take the overall match 181.5-80.5.
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