Young Americans Jordan Spieth and Patrick Reed will again play together for each other, team and country at this Ryder Cup, starting with Friday morning's opening match of foursomes against Europe's Justin Rose and Henrik Stenson.
And as they did in going 2-0-1 in Scotland two years ago, they'll try to win by trying to outdo the other.
Call it a competition within a competition.
"We want to beat the crap out of each other, to be honest," Spieth said, perhaps only half-joking. "We always seem to play well in the same groups, and part of it is because we want to beat each other."
Let Reed further explain:
"If I'm playing with Jordan, I'm going to go out and try to beat him on every hole," Reed said. "It's just one of those things: I grew up with Jordan. I've played junior golf with him, I feel like I've known Jordan my whole life. Every time we play, we're pushing each other so hard, trying to beat each other, it just brings out the best golf in us.
"We know if I'm beating him and he's beating me that, at the end of the day, the number is going to be really low."
At Gleneagles in 2014, that meant beating Europe's Ian Poulter and Stephen Gallacher 5-and-4 in Friday morning four-ball, beating Thomas Bjorn and Martin Kaymer 5-and-3 in Saturday morning four-ball and then halving with Kaymer and Rose in afternoon foursomes.