The Canadian golfer, Mike Weir, has built on a burst of six birdies in the first seven holes to surge three strokes clear after the opening round of the US PGA's Deutsche Bank Championship in Massachusetts.
The 2003 U.S. Masters champion has equalled the course record with a sparkling 10-under-par 61.
FedExCup points leader Vijay Singh, bidding for his third tour title in five starts,has fired an eight-birdie 64 to surge into a share of second place with Americans John Merrick, Briny Baird and Heath Slocum.
