Jordan Spieth's lead at the Masters was ethereal. Every time he seemed to grasp it on Sunday, it slipped away.
At stake: a second consecutive Masters title. Challengers stalked, and Spieth found par golf difficult as he hit Amen Corner, the notorious streak of holes that wrecks championships.
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Dustin Johnson and England's Danny Willett and Lee Westwood nipped at Spieth's heels. And Spieth was on the verge of one of the biggest chokes in recent Masters history.