Phil Mickelson has carded a 63, the joint-lowest round in Major history, to lead on eight-under after day one of The Open at Royal Troon.
The American rolled in eight birdie putts in near-perfect conditions, but his 15-footer for a record-breaking round at the last only just missed the drop.
Nine players had carded 63s in 144 previous Opens, the last being Rory McIlroy at St Andrews in 2010, but Mickelson's round was the lowest in an Open at Troon.
Compatriot Patrick Reed and Germany's Martin Kaymer are second on five-under, while England's Andy Sullivan is four-under, one ahead of fellow countryman Justin Rose.
Defending champion Zach Johnson is among a group of eight players on four-under, while McIlroy also enjoyed a promising start at the Ayrshire Links with a score of 69.
