Phil Mickelson's historic win at the PGA Championship may have been the story of the weekend, but a previously unaired video of second-placed Brooks Koepka has sparked possibly an even bigger reaction from golf fans.
Koepka, who finished two shots behind Mickelson in a tie for second at the major tournament, was questioned about how his second day went and couldn't hide his frustration in an interview after his round.
Add his well-documented fued with Bryson DeChambeau and you get what transpired in the sensational interview, with Koepka dropping several f-bombs and showing utter disdain for his fellow American.
In the clip, Golf Channel reporter Todd Lewis begins questioning Koepka about his second round.
As Lewis was speaking, Koepka appears to be distracted and eventually loses his train of thought as DeChambeau walks behind him in the shot.