Kevin Na leads Matt Kuchar by one shot after the third round of The Players Championship.
Only 18 holes have been played but Ian Poulter is on course to become the first Englishman to win the Players Championship in its 38-year history.
Rory McIlroy is the world's number one golfer again despite falling to America's Rickie Fowler in a play-off at the Wells Fargo Championship.
Jason Dufner has a two-stroke cushion over Canada's Graham Delaet, who is in sole second place after a 66, going into the final round of the Zurich Classic of New Orleans.
Ben Curtis will take a three-shot lead into the final round of the Valero Texas Open.
South African Branden Grace leads going into the fourth round of the Volvo China Open after an eight-under-par third round of 64.
Bubba Watson won the US Masters in the early hours of Monday morning, beating South Africa's Louis Oosthuizen on the second play-off hole.