Torrey Pines has had its share of conflict over the years involving some of the top players in golf. Just not during such a taxing major as the US Open.
In 2003, Phil Mickelson's quip about Tiger Woods' equipment didn't go down well.
Jordan Spieth and Patrick Reed had a falling out from the 2018 Ryder Cup in France but before they played together at Torrey Pines the former broke any tension by giving his fellow American a playful hug on the first tee.
Can anyone see Bryson DeChambeau and Brooks Koepka hugging it out this week?
"At this point, probably not," Spieth said with a smile.
But this spat is different from the other two that played out at Torrey Pines, getting so much attention that it has become the primary point of interest at this US Open.
The big development Tuesday morning? Tee times were announced.
No, they're not playing together.
Defending champion DeChambeau and two-time winner Koepka are on opposite sides of the draw and starting at opposite ends of the course.
There's a chance they might not even see each other this week.
Koepka, the 2017 and 2018 champion, left little to the imagination when talking about their relationship.
"I don't know if I'd call it a conflict," Koepka said.
"I don't know if I'd call it a conflict. We don't like each other. There's plenty of people you guys don't like. I don't see any difference." – Brooks Koepka
"We don't like each other. There's plenty of people you guys don't like. I don't see any difference."
This goes back nearly two years and has only intensified recently.
The US Open starts on Thursday (early Friday AEST), and both players will have enough concerns coping with a South Course with dense, punishing rough that looks to fit the bill as the toughest test in golf.
"It doesn't matter to me what goes on," Koepka said.
"It makes no difference to me. I'm out there trying to play my own game. What happens inside the ropes, it won't bother me."
DeChambeau described it as "great banter."
"I hope on the weekend we can play against each other and compete," DeChambeau said.
"I think it would be fun and would be great for the game."
For an individual sport with so many personalities, it should not be surprising that not everyone gets along.
"I think they've got a rivalry now, and I think it's good for the game in the sense of rivals," 2012 US Open champion Webb Simpson said.
Simpson even wondered if they were doing this on purpose to improve their reach with fans, tapping into a $40 million (AU$52 million) bonus pool based on player engagement.
"It would be fun to see them duel it out in a tournament here coming up, head-to-head on Sunday," he said.
Most other players have more pressing concerns, starting with how to keep the ball on the fairways and on the greens to avoid the rough.
Spieth stepped awkwardly last week and has been dealing with soreness in his foot, hopeful that daily improvements will have him at full strength by Thursday.
World No.2 Jon Rahm feels a little behind from a week without any practice after testing positive for coronavirus at the Memorial and having to self isolate.
- Doug Ferguson, Associated Press