Jason Roy and captain Joe Root both smashed centuries as the tourists easily reached their target of 361 with eight balls to spare in Barbados.
It was their highest ever run-chase in the format.
Chris Gayle's innings of 139 off 129 balls went in vain as the Windies' poor form in ODI cricket continued.
The second encounter of the five-match series will be played on Friday.
Fixing length does the trick for Rajasthan spinner Bishnoi
Rajasthan Royals leg-spinner Ravi Bishnoi believes he has turned a major weakness into his strength after putting on a match-winning display in Saturday's Indian Premier League (IPL) match against Gujarat Titans.
Barcelona beat 10-man Atletico to take major step towards title
Barcelona's Robert Lewandowski has come off the bench to score a late winner in a 2-1 victory away to 10-man Atletico Madrid on Saturday that moved the defending champions seven points clear of Real Madrid at the top of the LaLiga table.
Southampton's Charles nets late winner to stun Arsenal 2-1 in FA Cup
Shea Charles has scored five minutes from fulltime as second-tier side Southampton stunned Arsenal with a 2-1 victory in their FA Cup quarter-final at St Mary’s on Saturday on a night they remembered a famous victory in the competition 50 years ago.
Chelsea seek to turn corner after 7-0 FA Cup thrashing of Port Vale
Chelsea are hoping that Saturday's 7-0 thrashing of lowly Port Vale in an FA Cup quarter-final draws a line under a dismal run of form and internal upheaval that has threatened to ruin the season of the big-spending Londoners.
Haaland treble downs Liverpool as Man City head to FA Cup semis
Erling Haaland scored a hat-trick as Manchester City crushed Liverpool 4-0 in their FA Cup quarter-final at the Etihad Stadium on Saturday to cruise into the last four.
Jacob sits down with LANY for a fun, honest catch up that fans will love. 🎤
Watch the all new episode of I'm Not Your Dad. 🎙️
The legendary Craig David joins The Kris Fade Show for an unforgettable chat!
Catch the Ultimate Takeover with Jason Momoa on The Kris Fade Show. 🤩
