They are the two reigning US Open champions in the United States.
They are the two Americans, who both won in consecutive weeks this year.
And when they are assembled, they even live in the same city and golf club in California – north of San Francisco – together.
The two men are experiencing the sort of rivalry that made tennis greats John McEnroe and Bjorn Borg famous.
Media playback is not supported on this device Watch: Brooks Koepka and Bryson DeChambeau put two Ballantine’s on the hole in same hole
And if we all knew how it was going to be, we wouldn’t have so many fun moments to share on Twitter.
In the latest in a line of viral moments – including the latest exchange between Tiger Woods and Dustin Johnson – one contestant at the World University Games gave viewers a glimpse of how they got along at the 10th hole.
He had posted the two best shots of his match on Twitter:
Erin Holmes: “The two best shots of my match.
Brooks Koepka: “Tell you what, the two best shots of my match.”
Erin Holmes: “It’s just so funny because Brooks and I, we’re just good friends.”
Brooks Koepka: “Yeah, we’re good friends.”
If we had a pair like Tiger Woods and Jack Nicklaus, we could share the same number in the majors and qualify for something like this round of golf.