Justin Thomas successfully defended his CIMB Classic crown by three shots after watching Anirban Lahiri implode in Malaysia.
Lahiri teed off with a four-stroke lead at the Kuala Lumpur Golf and Country Club on Sunday but that advantage was quickly gone following a quadruple-bogey early on.
The Indian got his ball stuck in a tree at the third hole as he went from pace-setter to being two strokes off the lead.
And that opened the door for Thomas to go back-to-back, the American carding a flawless eight-under-par 64.
Thomas, who broke through for his maiden PGA Tour title last year, birdied eight holes without dropping a shot as he finished clear of Hideki Matsuyama.
Matsuyama rose up the leaderboard thanks to a final-round 66.
Lahiri (72) finished tied for third alongside Derek Fathauer (67) at 19 under.
Marc Leishman was one of four Australians in the top 10.
Leishman's 66 saw him place fifth, six shots behind Thomas, while American Keegan Bradley (68) was a stroke further back.
Australia's Scott Hend and South African Tyrone Van Aswegen (68) shared seventh at 15 under, a shot better than James Hahn (72).
Aaron Baddeley (68) and Adam Scott (70) - the former world number one - ended the tournament in 10th, alongside Siwoo Kim (66), Rafael Carbrera Bello (70), Ryo Ishikawa (70), Scott Piercy (72) and Russell Knox (74).