Australia’s Jason Day held off the challenge of Kevin Chappell to win the Arnold Palmer Invitational by one shot.
US PGA champion Day sank a 12-foot birdie on the 17th hole and then rescued par from the bunker on 18 to card a final round 70 in Orlando.
American Chappell finished on 16 under par after a final round 70, while England’s Paul Casey and Justin Rose tied for ninth place on 10 under.
“There was not one shot today where I was comfortable,” Day said.
The Australian, who carded bogeys at three of his first six holes, added: “I tried to be as deliberate as possible, which worked out well on the back side for me, but not on the front side.
“I was out of my zone, as shown by two bogeys on the par fives.”
Day, who rises one place to number two in the world rankings with the victory, begins his quest for back-to-back major championships at the Masters on 7 April.
Day, Chappell and Denmark’s Henrik Stensson shared the lead at 16 under with five holes to play, and Chappell edged ahead when he birdied the par-five 16th, but Day responded with a birdie on 17.
Chappell then came up short from 25 feet for par on the 18th after hitting the rough, and Day kept his nerve on the same hole by a sinking a four-foot par putt following a 30-yard chip from a bunker.