Golfer Jordan Spieth yesterday won the 2015 Masters at Augusta, Georgia: http://www.bbc.com/sport/0/golf/32278605 (read how he did it)....and this is what winners do! Leading last year as he went into the 4th and final round of the Masters, he finished as the runner-up. He must have been gutted  -  self-doubt could have set in and made winning in ...