US unless stated
-11 V Singh (Fiji)
-8 T Woods, J Rose
-6 S Micheel, JJ Henry
-4 A Baddeley, R Allenby
-2 R Karlsson
Fiji's Vijay Singh shot a course record 10-under par 61 to scorch into the lead at the Deutsche Bank Championship in Boston.
The world number four was in superb form, managing nine birdies and an eagle in his round.
Tiger Woods picked up a birdie at the last to move to second with a 67, but is still three shots behind.
Overnight leader Justin Rose had a modest round of 69 and is level with Woods on eight under.