Then, on the 17th, Lewis hit into the bunker off the tee and missed a long par putt to card her second bogey of the back nine.

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Luke Guthrie, tied with Thompson for the 54-hole lead, fell behind with a bogey on the second hole and closed with a 73 to finish third.

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Donald, the world number six from England, recovered from a double bogey on the second with 11 straight pars from the eighth to end with a 71, while Northern Ireland's McDowell had an adventurous round of five birdies and five bogeys.

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