Jordan Spieth has said that he must try to "throw away" any memories of his poor third-round finish during the final day of The Masters later today.

Spieth, the defending champion, has now led for seven straight rounds at Augusta, but his one-shot advantage over fellow American Smylie Kaufman would be much more convincing had he not gone bogey-double bogey on the 17th and 18th yesterday.

"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," Spieth told reporters.

"[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."

Spieth is aiming to become the fourth player after Jack Nicklaus, Sir Nick Faldo and Tiger Woods to win back-to-back titles in the year's first Major.