Kevin Kisner took advantage of home comforts to maintain his sizzling early season form and surge one shot clear in the opening round of the RSM Classic.
American Austin Ernst took a one-shot lead at the CME Group Tour Championship, while Lydia Ko strengthened her grip in the race for 2015 LPGA Tour honours.
New Zealand's world number one Lydia Ko and second-ranked Park In-bee of South Korea are set to battle it out for an array of LPGA Tour honours this week.