(Reuters) - World number one Dustin Johnson overhauled halfway leader Shane Lowry to open up a one-stroke advantage after the third round of the windswept RBC Heritage in South Carolina on Saturday.
Johnson, a South Carolina native, shot a three-under 68 in trying conditions to end on 10-under 203, making his move with three consecutive birdies from the 13th and holding on to his lead despite dropping shots at 16 and 17.
Lowry's lead evaporated with three bogeys on the back nine and he finished with an even-par 71, tied for second on nine-under along with Ian Poulter (67) and Rory Sabbatini (68) at Hilton Head Island's Harbour Town Golf Links.
Six others were tied a shot further back on eight-under 205.
(Reporting by Gene Cherry in Salvo, North Carolina; Editing by Peter Rutherford)