Chile's Joaquin Niemann won the UK leg of the LIV Golf tour for his fifth title of the season.
It came after the 26-year-old parted ways with his coach and caddie after missing the cut at the Open earlier this month.
Niemann started the final round with a six-shot lead at the JCB Golf and Country Club in Rocester.
And a steady round of 68, including five birdies and a bogey, left his rivals with a gap that proved too big to close.
Nearest challenger Bubba Watson did make a bold effort as his six-under 65 - featuring a run of four birdies and two eagles on the back nine - threatened to make things interesting.
Niemann admitted feeling some pressure before he settled to finish three shots clear on 17 under.
"I felt like today I was pretty calm, pretty chill, until Bubba started playing golf," he said.