Bubba Watson will take a three-shot lead going into the final day of the WGC-Cadillac Championship in Miami, Florida.
The American hit a third-round 67 on the Blue Monster course to end the day 17-under-par.
England's Justin Rose is tied for second with America's Keegan Bradley.
Rose carded a round of 69, while Bradley posted a score of 67 to leave the pair on 14-under.
Newly-crowned world number one Rory McIlroy made the leap up to eight following a round of 65.
The Irishman put two bad days behind him to finish on nine-under.