Adam Scott banished any doubts about how he would cope without the long putter which helped him become number one in the world with victory in the Honda Classic on Sunday.
Scott carded a closing 70 at PGA National to finish nine under par, one shot ahead of playing partner Sergio Garcia, who was left to rue dropped shots on the 16th and 17th in his 71.
American duo Blayne Barber and Justin Thomas shared third place on five under, with Graeme McDowell a shot further back in fifth after a closing 69.
Scott won the Masters in 2013 using a long putter and reached the top of the world rankings in May 2014, a week before his last victory in the Crowne Plaza Invitational, but has successfully reverted to a conventional club in order to comply with the ban on anchored strokes which came into effect on 1 January.
The 35-year-old began the final round tied with Garcia and moved two shots clear with birdies on the first and fifth as he looked to become the first player since Phil Mickelson in 2009 to win on the PGA Tour after carding a quadruple bogey.
The Australian had enjoyed a three-shot lead before finding water twice on the par-three 15th in the third round to run up a seven, although a birdie on the 17th helped repair some of the damage.
Garcia had bogeyed the 17th before a birdie on the 18th took the good friends into the last day tied at the top of the leaderboard, but the Spaniard had to settle for nine straight pars on the front nine in the final round.
However, with Scott dropping a shot on the ninth after failing to get up and down from a greenside bunker and another on the 10th after a wayward drive, Garcia was back on level terms before missing from two feet for par on the 11th after his approach only cleared the water by a few yards.
Scott restored his two-shot lead after a superb approach from a fairway bunker on the 12th left him with a tap-in birdie, only for Garcia to reduce his deficit to a single shot with a birdie on the 14th.
Both players bogeyed the 16th and Garcia's chances of victory effectively disappeared with another bogey on the next, although the Ryder Cup star at least birdied the last before Scott calmly tapped in for par to secure the win.