Bryson DeChambeau will peg it up against Brooks Koepka in Las Vegas in November in a...12-hole match.
Whether or not there was bad blood, it will only be down to them to spill the beans.
DeChambeau seemed to ignite the feud when Koepka's famous eye-roll interview went viral.
Walking behind Koepka being interviewed about putting on tricky greens, DeChambeau muttered: "You just gotta start them on line."
The rest, as they say, is history and what followed has been one of the funniest back and forths of all time.
DeChambeau once suggested his driver "sucked" and Koepka later had a smirk on his face as he said: "I love my driver".
Then there was Brooksy-gate.
Koepka, 31, then famously offered a free beer for anyone who had been chucked out for heckling 28-year-old DeChambeau.
The pair "made-up" at an hilarious post-Ryder Cup victory press conference as Justin Thomas urged them to hug.
Some have suggested that this 12-hole match in Las Vegas is a compromise.
A compromise between DeChambeau wanting to play 18 holes and Koepka wanting to play none.
Let's face it, this is one that was always going to happen.
The fact it has taken this long to announce is the only real surprise.
The pair will peg it up the day after Thanksgiving, Friday 26 November, for the fifth edition of 'The Match'.
Phil Mickelson and Tiger Woods have previously been involved in this format, with Lefty taking the win.
It will take place at the Wynn Golf Club in Las Vegas.
Here's the best of how social media users reacted to the news:
Me for months: I hope this stupid thing will end and they'll just get along— Riggs (@RiggsBarstool) October 5, 2021
Also me: Will watch; I'm rooting for blood https://t.co/dLB5cdmuGd
The irony of it is that they can't stand to be in the same room as each other but offer loads of £££$$$$ and they'll be all pretend friendly for the cameras again.— Si Whitt (@si_whitt) October 6, 2021
What's the deal with 12 holes? It's like the Yankees and the Red Sox playing 5 innings....— UTSki (@JSkizer4351) October 5, 2021
More likely boring now that they kissed and made up— xgolfer869 (@georgetirbtr) October 6, 2021
Man I miss Tiger— sean goodwin (@golferbackwards) October 6, 2021