Centuries from Jason Roy and Joe Root helped England complete their highest one-day run-chase and beat West Indies by six wickets in the first ODI.
Roy scored 123 off 85 balls and Root 102 off 97 as the tourists cruised to their 361-run target with eight balls to spare in Barbados.
Eoin Morgan made 65 and Jos Buttler sealed victory after Root holed out with the scores level.
Chris Gayle earlier made 135 to help West Indies post 360-8.
He struck 12 of West Indies’ 23 sixes – a record for an ODI innings – as they made their highest total against England.
However, Roy – who dropped Gayle on nine – rarely looked troubled as the number one ranked one-day team played with a controlled aggression to surpass the 350-3 they made against New Zealand at Trent Bridge in 2015.
It was the fourth highest chase by any side in ODI history.
Although it was an excellent wicket for batting, West Indies were sloppy in the field, with Roy and Root both dropped twice.
The second game of the five-match series takes place at the same venue at 15:00 GMT on Friday.