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Shenzhen, China • On another big stage against another strong field, Louis Oosthuizen made it look easy.

Oosthuizen, with a simple swing considered among the most pure in golf, again took advantage of the par 5s at Mission Hills, shooting a 9-under 63 Friday in the HSBC Champions to build a five-shot lead and break a World Golf Championships record that previously belonged to Tiger Woods.

Along with opening a five-shot lead, Oosthuizen reached 16-under 128. That's the lowest score to par through 36 holes in any World Golf Championships event since 1999.

Woods had a 15-under 125 at Firestone in 2000, and he was at 15-under 127 at The Grove outside London in 2006 at the American Express Championship. Woods went on to win those events by 11 shots and eight shots, respectively. Ernie Els was nearly as perfect as Oosthuizen. He also had a 63 that vaulted him from 19th place into a tie for second with Adam Scott of Australia, who had a 68.

Champions Tour

Jay Haas matched the Champions Tour record with a 10-under 60 to open a five-stroke lead on Friday in the Charles Schwab Cup Championship in Scottsdale, Ariz.

The 58-year-old Haas made a 5-foot birdie putt on the par-5 18th after hitting his second shot into a greenside bunker and leaving his eagle blast short. —

Leaderboard

HSBC Champions

Louis Oosthuizen -16

Ernie Els -16