SHENZHEN, CHINA - NOVEMBER 03: Lee Westwood of England during the third round of the WGC HSBC Champions at the Mission Hills Resort on November 3, 2012 in Shenzhen, China. (Photo by Ross Kinnaird/Getty Images)

SHENZHEN, China – Lee Westwood made 11 birdies to shoot a 61 on Saturday and grab a share of the lead with struggling Louis Oosthuiven after the third round of the HSBC Champions.

Oosthuiven, the 2010 British Open champion, came into the weekend with a five-stroke lead over the field, but struggled with his putting and carded a 70.

The two are level at 18-under going into Sunday, three shots ahead of Phil Mickelson, who made seven birdies en route to a 66.

Ernie Els briefly surged into a share of the lead on the back nine before hitting into a reservoir on the tricky 15th hole and taking a double bogey. He shot a 69 to drop to fourth place, level with Bill Haas (66) and Ian Poulter (65). – Sapa-AP