News Tiger Woods, Phil Mickelson, Lee Westwood and Martin Kaymer in martial arts exhibition at HSBC Champions in Shanghai Wednesday, October 05, 2011 1 of 5 Andy Wong/AP Tiger Woods and Lee Westwood had some fun during a martial arts exhibition. Westwood recently passed Woods for No. 1 in the World Ranking. 2 of 5 Scott Halleran/Getty Images Westwood is the top-ranked player in the world for the first time in his career. 3 of 5 Scott Halleran/Getty Images Phil Mickelson played 12 tournaments this season with a chance to take the No. 1 ranking, but he never placed high enough to pass Woods. 4 of 5 Andy Wong/AP Each of the top four players in the world took part in the exhibition. 5 of 5 Andrew Redington/Getty Images Phil Mickelson, Tiger Woods, Lee Westwood and Martin Kaymer each have a chance to take over the No. 1 ranking this week. You May Like Gear FIRST LOOK: Titleist’s Vokey SM7 Slate Blue wedge Gear FIRST LOOK: Ping G410 drivers, fairway woods, hybrids and irons News Lucas Glover disputes police report, excited for ‘closure’ Gear Wall-to-Wall Equipment: Tiger’s TaylorMade P7TW irons, Koepka’s new gear and more Travel Atlanta’s best golf courses: The top-ranked courses in Atlanta Travel Atlanta’s best public golf courses: Where you can play in Atlanta for the Super Bowl More News The best thing this week at Torrey Pines and more: Bamberger’s 7 best things in golf right now Tom Brady’s ridiculous comebacks happen on the golf course, too — just ask Keegan Bradley Lucas Glover disputes police report, excited for ‘closure’ Tour Confidential: Will Mickelson’s 2019 be better than Tiger’s?