Australian John Senden and New Zealander Phil Tataurangi have both made bright starts to sit three strokes from the lead after the first round in the St Jude Classic.
The Australasian pair shot rounds of four-under 66 to lie in an eight-man group tied for fourth.
But the day belonged to world No.3 Lee Westwood who made himself right at home on his first trip to Memphis as he posted a course-record 63 at TPC Southwind.
The Englishman's seven-under-par opening round at the par-70 course gave him a one-stroke clubhouse lead over the morning wave of starters in Tennessee, with American Casey Wittenberg back home in six-under and Ireland's Padraig Harrington third following a 65.
England's Ian Poulter, the world No.5, leads the way for the late starters alongside American Lee Janzen and Stephen Ames of Canada at three-under after 10, 11 and 13 holes respectively.
Westwood, who played next week's US Open venue Pebble Beach on Sunday and Monday ahead of the second major of the year, hit the ground running in Memphis. He went bogey-free with five birdies and an eagle, going out in 29 for his opening nine holes, starting from the 10th tee and including his three at the par-five 16th.
Westwood added his fifth and final birdie of the round before carding pars all the way home - the only blemish, he felt, was a missing short birdie putt at the ninth, his last.
"Twenty-nine, that was a pretty good start," Westwood said.
"And 63 is always a good start. I couldn't be disappointed with that."
"Could have been better, but I'm not going to cry too much from missing from four feet on the last."
Westwood said he has not easily been fazed at the thought of playing new courses and he had had good experiences in those situations - not least at last November's Dubai World Championship, where victory on the just opened Earth Course made him the European Tour No.1 as he topped the inaugural Race To Dubai rankings.
"It's been a long time since I played a course for the first time," he said.
"I just played the Honda for the first time this year. I finished in the top 10. That was pretty good."
"Last year we all played the course at Dubai for the first time there. I was 23-under."
"I adjust fairly well, I think. You can play most courses if you hit it straight and close."
Harrington was just as pleased with his bogey-free opening 65, which came two weeks after undergoing minor knee surgery to repair torn knee cartilage and a month after missing the cut at The Players Championship in his last outing in the USA.
"I'm happy, yes," Harrington said. "I suppose it's always there, beware of the injured golfer."
"Expectations aren't quite as bold when you're out there. I thought it was nice to play well and did the right things at the right time."
England's Greg Owen finished at one-under following an opening 69 while world No.10 Rory McIlroy of Northern Ireland was at level par after 12 holes.
Australia's Robert Allenby did not get a chance to continue his run of good form at TPC Southwind. A joint runner-up in 2008 and tied for fourth last year, Allenby withdrew on Friday morning due to illness.