Scottie Scheffler and Sam Burns set for Sunday shootout at FedEx St. Jude Championship

The American settled in after a rough start Saturday to card a two-under 68 around TPC Southwind, enough to take him to13 under for the tournament, two ahead of red-hot Sam Burns and Sungjae Im.

Scheffler only managed to hit one green in regulation in the opening five holes and was one over after seven. But he finally found his range and drilled crisp iron shots into the remainder of the par threes, making birdies on two of them. He went birdie-bogey-par on the final three holes.

That, combined with Burns' superlative eight-under 62, means that Scheffler will be in the final group with one of his best friends on Sunday. 

"It's always a little weird just because I want him to have success so much and I think he wants the same for me," Scheffler told the press.

"Tomorrow we'll go out there and play our game and see where things finish up at the end of the day. It will be competition like normal. It will be fun being out there with your friend, but it's also a bit weird at the same time.

"Any time you're holing those 10- to 15-footers, it's really nice to keep the round going. I holed a few of those today. It was definitely important to keep the momentum in the round."

Burns is under no illusions as to the challenge that awaits on Sunday.

"Scottie is obviously playing great, as he always does," reflected Burns.

"He's not going to lay down. He's going to play great tomorrow. So you're going to have to go out there and put a really good round together and see if you can catch him."

Further down the leaderboard, FedEx Cup champion Tommy Fleetwood (68) and Jake Knapp (67) are both five shots adrift in T4.