Spieth says Fleetwood is big threat at Open

Jun 17, 2018; Southampton, NY, USA; Tommy Fleetwood lines up a putt on the fourteenth green during the final round of the U.S. Open golf tournament at Shinnecock Hills GC - Shinnecock Hills Golf C. Mandatory Credit: Brad Penner-USA TODAY Sports

LONDON (Reuters) - Reigning champion Jordan Spieth believes Tommy Fleetwood could be the biggest threat at next month's British Open after a sensational second place at Shinnecock Hills last week.

Spieth was a mere spectator as Englishman Fleetwood fired a magnificent final-round 63 to match the lowest round in U.S. Open history and almost snatch victory.