KOHLER, Wis. – Americans Cristie Kerr, Brittany Lincicome and Lizette Salas shot 3-under 69 to share the first-round lead Thursday in the U.S. Women’s Open.

Ai Miyazato, coming off a victory Sunday in the LPGA Tour event in Arkansas, was a stroke back, along with 17-year-old Lexi Thompson, Jennie Lee and Beatriz Recari.

Defending champion So Yeon Ryu opened with a 74 as players struggled in the nearly 100-degree heat and high humidity at Blackwolf Run.

Se Ri Pak, the 1998 Open winner on this course, had a 72.

Top-ranked Yani Tseng shot a 74. She would become the youngest player to complete a career Grand Slam with a victory this weekend.

Second-ranked Stacy Lewis opened with a 77.

Kerr has 14 career LPGA wins and was the 2007 U.S. Women’s Open champion.

PGA: Vijay Singh shot a 7-under 63 to take the first-round lead in the Greenbrier Classic, leaving Tiger Woods eight strokes back.

The 49-year-old Singh birdied his final four holes on The Old White TPC course. He won the last of his 34 PGA Tour titles in 2008.

Jeff Maggert, a year younger than Singh, was a stroke back at 64 along with Jonathan Byrd and Martin Flores. U.S. Open champ Webb Simpson topped a group at 65.

Woods, coming off a victory Sunday at Congressional, had a 71.

Woods tumbled with a double bogey on the par-5 17th, driving into a hazard, taking a penalty stroke and three-putting from 20 feet.

Phil Mickelson, who missed the cut last year, also had a 71.

Defending champion Scott Stallings birdied his final three holes for a 67.

EUROPEAN TOUR: Christian Nilsson of Sweden shot a 6-under 65 to lead by a stroke after the first round of the French Open at Saint-Quentin-en-Yvelines, France.

Gary Boyd of England and Matteo Manassero of Italy shot bogey-free 66s to share second place with Wales Open winner Thongchai Jaidee of Thailand.

LADIES EUROPEAN TOUR: Former No. 1 player Lorena Ochoa is making a limited return and will play in October at the French Open.

The 30-year-old Mexican retired in 2010 and gave birth to a son in December 2011.