Carl Pettersson (Getty Images)
Sweden's Carl Pettersson won the RBC Heritage in South Carolina by a convincing five shots today as Luke Donald saw Rory McIlroy reclaim his World Number One ranking.
Pettersson, who led by a shot from American Colt Knost overnight, finished with a two under par 69 to end the tournament at Harbour Town on 14 under.
That total put him well clear of Zach Johnson of the United States, with Knost a shot further back in third on eight under.
Johnson went round in 70 today, while Knost saw his hopes of glory ended by a disappointing 74.
Donald ended the tournament in joint 37th to lose his World Number One ranking to McIlroy.
The Englishman, who closed with a second successive level par 71, needed to finish in the top eight to retain top spot, but ended on two over, 16 shots behind Pettersson.
The Swede got off to a flying start with three birdies in his first five holes, and he could comfortably afford a bogey sixth on the 15th.
Johnson was also three under through five for the round as he looked to challenge Pettersson, but four bogeys and only two more birdies ended his challenge
Knost's hopes were all but ended by a triple-bogey seven on the third as he completed his final round in three over.
He finished ahead of two more Americans, Kevin Stadler and Billy Mayfair, on six under.
Brian Davis was the next-best European in a tie for 13th after a final-round 73 left him three under overall.
Donald went round in level par, bouncing back from a double-bogey six on the first with birdies on the fifth and sixth.