Westwood takes 7-shot lead at Sun City after 62

The No. 3-ranked Westwood produced the best round ever under normal rules at Sun City as he reeled off 10 birdies to power to a 16-under total of 200 and take control of the $5 million invitational event with one round to play.After Padraig Harringtons 61 in 2001 when players were allowed to clean and place their ball because of wet weather Westwoods performance was the lowest score in the 30 years of the Nedbank Challenge.The Englishman picked up eight shots on overnight leader Graeme McDowell (70), who shared second on 9 under with Robert Karlsson (69).Westwood didnt drop a shot in a third-round performance even more commanding than the second-round 64 he shot here last year to set up an eight-stroke win.He left the worlds top-ranked player, the No. 4-ranked player, two current major champions and one former major winner all trailing in his wake.The Nedbank defending champions birdies came in clutches as he grabbed three in a row from No. 2 and three more in succession through the turn. He finished by picking up four more shots on Nos. 14 through 17.Westwood made birdie on each of the four par-5s and his score would have been even lower had he holed one of the four eagle putts he had on those long holes.McDowell the 2010 U.S. Open winner had an eagle, three birdies, a bogey and a double-bogey to share second with Karlsson, who carded his third straight 69 at Gary Player Country Club.American Jason Dufner returned a 2-under 70 after dropping a shot on No. 18. The Nedbank Challenge rookie was tied for fourth with No. 4-ranked Martin Kaymer, who also shot 70 with five birdies, a bogey and a double-bogey.But none of the 12-man field which also features top-ranked Luke Donald, Masters champion Charl Schwartzel and British Open winner Darren Clarke could come close to the consistent brilliance of Westwood.