Grand Slam bid will take 'luck', says Woods

World number one Tiger Woods may have already spoken about the possibility of completing a Grand Slam of the majors, but he admits an element of luck will still be required.

After the 32-year-old won a record sixth Buick Invitational on Sunday to join Arnold Palmer in fourth place on the all-time PGA Tour winners' list, Woods reiterated his belief a clean sweep of all four majors in one season is within his grasp.