South Africa's Louis Oosthuizen always seems to find some form when the major championships arrive, and this week's US Open is no different.
The 38-year-old finished second at the PGA Championship last month and once again finds himself in a tie for the lead after Thursday's opening round of the US Open at Torrey Pines.
Oosthuizen was tied for the lead on four under with two holes left to play when the first round in San Diego was suspended due to darkness, and he definitely wasn't intimidated by the difficult Torrey Pines layout.
"I just enjoy playing really tough golf courses. I think somehow I focus a little bit better when I play those courses, knowing that the margin for error is really small," he said.
"Especially around this place, you've got to drive it well, you've got to start it in the fairway, and you're going to have trouble if you're missing fairways around this golf course and I've really been driving it good lately.
"I played nicely, putted nicely and hopefully I will just keep the momentum going."
The next-best placed South African was Charl Schwartzel, who opened with an even-par 71, while young gun Wilco Nienaber, making his major debut, signed for a solid one-over 72 to sit alongside Christiaan Bezuidenhout.
Dylan Frittelli shot a two-over 73 to finish in a share of 61st alongside Branden Grace, who still had three holes left to play in his first round.
Others fared less well, however. Last week's PGA Tour winner Garrick Higgo was in a tie for 110th after five-over 76, while Erik van Rooyen had a 74 and Thomas Aiken a horror 80.
Scores in Thursday's darkness-halted opening round of the 121st US Open at par-71 Torrey Pines (a denotes amateur, 36 players to finish Friday morning):
67 - Russell Henley (USA)
68 - Francesco Molinari (ITA), Rafa Cabrera Bello (ESP)
69 - Brooks Koepka (USA), Xander Schauffele (USA), Hayden Buckley (USA), Hideki Matsuyama (JPN), Jon Rahm (ESP)
70 - Edoardo Molinari (ITA), Fabian Gomez (ARG), Patrick Rodgers (USA), Matthew Wolff (USA), Matt Fitzpatrick (ENG), Tyrrell Hatton (ENG), Adam Hadwin (CAN), Taylor Montgomery (USA), Richard Bland (ENG), Adam Scott (AUS), Rory McIlroy, (NIR)
71 - Greyson Sigg (USA), Marcus Armitage (ENG), Guido Migliozzi (ITA), Daniel Berger (USA), Kim Si-woo (KOR), a-Andrew Kozan (USA), Charl Schwartzel (RSA), Robert MacIntyre (SCO), Lee Westwood (ENG), Paul Casey (ENG), Sergio Garcia (ESP), Dustin Johnson (USA)
72 - Cameron Young (USA), Wilco Nienaber (RSA), Brian Harman (USA), Tommy Fleetwood (ENG), Harris English (USA), Shane Lowry (IRL), JT Poston (USA), Adrian Meronk (POL), Wade Ormsby (AUS), Tom Hoge (USA), Christiaan Bezuidenhout (RSA), Scottie Scheffler (USA), Bubba Watson (USA), Patrick Reed (USA)
73 - a-Pierceson Coody (USA), Mackenzie Hughes (CAN), Justin Thomas (USA), Kevin Kisner (USA), Matt Kuchar (USA), Abraham Ancer (MEX), Jason Kokrak (USA), Paul Barjon (FRA), Dylan Frittelli (RSA), Akshay Bhatia (USA), Stewart Cink (USA), Bryson DeChambeau (USA)
74 - Brad Kennedy (AUS), Chris Baker (USA), Viktor Hovland (NOR), Billy Horschel (USA), Gary Woodland (USA), Tony Finau (USA), Jimmy Walker (USA), Ian Poulter (ENG), Martin Laird (SCO), a-Matthew Sharpstene (USA), David Coupland (ENG), Erik van Rooyen (RSA), Matt Wallace (ENG), Marc Leishman (AUS)
75 - Jhonattan Vegas (VEN), Collin Morikawa (USA), Phil Mickelson (USA), Corey Conners (CAN), Bernd Wiesberger (AUT), Kang Sung (KOR), Taylor Pendrith (CAN), Zach Zaback (USA), Troy Merritt (USA), Joaquin Niemann (CHI), Victor Perez (FRA), Will Zalatoris (USA)
76 - Sahith Theegala (USA), Andy Pope (USA), Yosuke Asaji (JPN), Henrik Stenson (SWE), Ryan Palmer (USA), Max Homa (USA), Cameron Champ (USA), Lee Kyoung-hoon (KOR), Davis Shore (USA), Roy Cootes (USA), a-Joe Highsmith (USA), Chez Reavie (USA), Garrick Higgo (RSA)
77 - JJ Spaun (USA), Martin Kaymer (GER), Kevin Na (USA), Sam Ryder (USA), Ryo Ishikawa (JPN), a-Joe Long (ENG), Luis Fernando Barco (PER), Mario Carmona (MEX), Wilson Furr (USA), Hayden Springer (USA), Eric Cole (USA), Jordan Smith (ENG), a-Cole Hammer (USA), Jordan Spieth (USA)
78 - Robby Shelton (USA), Dylan Meyer (USA), Bo Hoag (USA), Tyler Strafaci (USA), Justin Rose (ENG)
79 - Webb Simpson (USA), James Hervol (USA)
80 - Thomas Aiken (RSA), Steve Allan (AUS)
82 - Alvaro Ortiz (MEX)
Groups needing to finish first round on Friday:
Matt Jones (AUS)
Brendan Steele (USA)
Cameron Smith (AUS)
Carlos Ortiz, (MEX)
Zach Johnson (USA)
Lanto Griffin (USA)
Sam Burns (USA)
Chan Kim (USA)
Thomas Detry (BEL)
a-Ollie Osborne (USA)
Peter Malnati (USA)
Brian Stuard (USA)
John Huh (USA)
Johannes Veerman (USA)
Zack Sucher (USA)
Rick Lamb (USA)
Michael Johnson (USA)
Carson Schaake (USA)
Patrick Cantlay (USA)
Louis Oosthuizen (RSA)
Im Sung-jae (KOR)
Kevin Streelman (USA)
Branden Grace (RSA)
Charley Hoffman (USA)
Sebastian Munoz (COL)
Rikuya Hoshino (JPN)
Brendon Todd (USA)
Wyndham Clark (USA)
a-Matthias Schmid (GER)
Matthew Southgate (ENG)
a-Spencer Ralston (USA)
Dylan Wu (USA)
Justin Suh (USA)
Luis Gagne (CRC)
Kyle Westmoreland (USA)
Christopher Crawford (USA)