Defending champion Jordan Spieth admitted he would struggle to forget how his poor finish had left the destiny of the 80th Masters up in the air.
Spieth held a four-shot lead with two holes to play on a windswept day at Augusta National, but bogeyed the 17th and double bogeyed the 18th after wild drives to card a 73 and finish three under par, just a shot ahead of fellow American Smylie Kaufman.
''I just have to absolutely throw it away, the finish to this round, pretend it's a new round, everyone is tied and you have to shoot the best score to win," said Spieth, who is aiming to become the fourth player after Jack Nicklaus, Sir Nick Faldo and Tiger Woods to win back-to-back titles.
"(I have to) understand it's the position I wanted to be in after 54 holes and not think about the finish to this round.' It's going to be very difficult. I played the last three holes, the last two days, five over par. There was no challenge in those holes really.
"If I'm at five, six under, that certainly brings anyone who is over par almost out of the tournament. And now with very little wind (on Sunday), someone gets on a run and shoots six, seven under, I know I have to shoot a significant under par round in order to win this tournament, when I could have played a different style of golf like I did on Sunday last year."
Asked how he would clear his head, Spieth joked: "Probably go break something really quick, have dinner and watch a movie. I think it will be tough personally. That wasn't a fun last couple holes to play from the position I was in."