Dustin Johnson had a chance to run away from the field Saturday in the HSBC Champions. But he made two double bogeys in his 6-under 66 and saw his lead cut in half to three shots going into the final round of this World Golf Championship.

Johnson ran off five straight birdies on the front nine, and then four straight birdies on the back nine to lead by six shots over Ian Poulter.

Poulter made a birdie on the 18th for a 63, and Johnson hit his drive into the water on the closing hole for his second double bogey.

Johnson was at 18-under 198, three clear of Poulter. Graeme McDowell had a 64 and was four shots behind.

Martin Kaymer set the course record with a 62.