Fredrik Jacobson of Sweden capitalized on poor putting by overnight HSBC Champions leader Keegan Bradley Friday to storm to the top of the leaderboard at 11-under-par. Jacobson dazzled with a 6-under-par 66 second round score to add to his opening account of 67 and take control at the halfway stage in the China showcase. Major winner Bradley, the current PGA champion, dropped to fourth on 135 despite starting strongly by holing a 40 foot eagle putt on the 2nd hole of the Sheshan course. Breathing down Jacobson's neck in tied second on 10-under are South African 2010 Open Champion Louis Oosthuizen and Australian Adam Scott. Flawless Oosthuizen raced from his first round one-over to seven-under by the 15th hole and carded nine birdies overall in a blistering second round score of 63. Akron World Champion winner Scott began to feel his way on the softening course which endured more overnight rain, carding nine birdies and two bogeys to score one better than Jacobson. Malaysia PGA Tour winner American Bo Van Pelt kept in touch with the leaders with a three-under 69 and is in joint fifth with England's Paul Casey on an eight-under-par overall score of 136. Germany's 2010 PGA champion Martin Kaymer and Australian Aaron Baddeley both shot 4-under-par 68s and moved into joint 7th place alongside world number two Lee Westwood on seven-under. Englishman Westwood bogeyed the 10th hole and missed a bunker putt on the 16th by a whisker but maintains his presence with his five birdies. World number three Rory McIlroy carded a disappointing 69. Couples, Haas share lead US Presidents Cup captain Fred Couples shot a 3-under 68 for a share of the lead with assistant captain Jay Haas after the first round of the Champions Tour's season-ending Charles Schwab Championship Thursday. David Frost and Michael Allen were a stroke back and Charles Schwab Cup points leader Tom Lehman matched Kenny Perry and Rod Spittle at 70.For the past few weeks, Couples has been dogged by questions about his decision to include Tiger Woods on the American team.