Scottie Scheffler admitted he was thinking about shooting a "pretty cool" 59 during his incredible round at the Northern Trust.

The American became the 11th different player to break 60 at a PGA Tour event with his showing at TPC Boston on Friday.

Scheffler made 12 birdies during his round, but needed four on his final five holes to achieve the feat.

The 24-year-old, who became the second-youngest player to break 60 on the PGA Tour, said he started thinking about the achievement after missing a birdie putt at 13.

"I wouldn't say the thoughts are too negative because it keeps fighting you to make birdies instead of being complacent and settling for whatever I was at," Scheffler told reporters.

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Scottie Scheffler becomes the 11th TOUR pro to shoot 59 or better. pic.twitter.com/6MsEwO0zaH

— PGA TOUR (@PGATOUR) August 22, 2020

"I actually missed a putt today on 13 for birdie, and it kind of clicked. I was like, 'Oh, man, that would have been a nice one to go in' because I was playing really good at that point.

"Kind of clicked like, 'Hey, you know, I have a chance to do something pretty cool today' and got rolling again pretty quick on 14, 15, 16, and made a great birdie on 18 as well.

"I wouldn't say those thoughts are negative at all. You obviously put them in the back of your head when you're hitting shots and stuff but as far as thinking about it, it's not necessarily a negative because it encourages me to continue to make birdies."

Scheffler finished the second round two shots adrift of leader Dustin Johnson.