Tiger Woods , Phil Mickelson and Martin Kaymer can topple new golf No . 1 Mickelson , who also won in Shanghai in 2007 , believes any player in the 78-man field can win this year 's title in the sixth staging of the tournament . Lee Westwood . Quartet lining up for WGC-HSBC Champions tournament in China this week . TL;DR Fellow American Mickelson is the defending champion , having also won in 2007 .
Tiger Woods , Phil Mickelson and Martin Kaymer can topple new golf No . 1 Lee Westwood . Quartet lining up for WGC-HSBC Champions tournament in China this week . TL;DR Fellow American Mickelson is the defending champion , having also won in 2007 .