Dubuisson then conjured two miraculous up-and-downs from desert scrub at the 19th and 20th holes to keep the match alive before Day sealed the win by sinking a four-footer for birdie at the 23rd, the driveable par-four 15th.
It was Day's second triumph on the PGA Tour and his first success in one of the elite World Golf Championships (WGC) events which bring together the game's leading players.
(Reporting by Mark Lamport-Stokes in Los Angeles; Editing by Larry Fine)
