US golfer Jordan Spieth (3rd L) puts on his waterproofs as the rain falls during a practice round on The Old Course at St Andrews in Scotland, on July 15, 2015, ahead of The 2015 Open Golf Championship which runs July 16-19. US golfer Jordan Spieth arrives at St Andrews with a shot at becoming just the second man - after Ben Hogan in 1953 - to win the first three majors of the year, setting up the mouthwatering prospect of him pulling off the Grand Slam at the PGA Championship next month. AFP PHOTO / ADRIAN DENNIS        (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)