Kevin Na told former England Test batsman Kevin Pietersen to "stick to your own sport" after the cricketer's criticism on social media.
While playing at the Genesis Open in California, Pietersen filmed Na taking his time over a 3-foot putt on the second hole of his final round.
Na was fighting for the lead with Bubba Watson at the time, and eventually finished tied for T2 with Tony Finau on -10, two shots off Watson.
It seems Pietersen was aware of Na's reputation for playing slow, and despite what appeared to be a turning surface, decided to lament the golfer on this occasion.
As was later pointed out, the putt ended up being the difference between second and fourth, and $300,000 in prize money, so who can blame Na for taking a minute and 20 seconds to sink it.
"SERIOUSLY, Kevin Na?!?!," wrote Pietersen on Twitter as he filmed the putt on his television.
"That Is A Tap In, MATE!"
The Surrey cricketer wasn't done there, posting another ridiculing video on Wednesday, attempting to show Na how it should be done.
Filming at Donald Trump's Dubai golf resort, Pietersen said: "I took you out the other day because a tap-in took you a minute and 20 seconds," Pietersen said.
"One minute and 20 seconds. This is what you do with a tap-in mate, you start counting."
Pietersen then counts seven seconds as he taps the ball in, before saying: "That's how it's done, bro."
Na hit back on Instagram writing: "@kp24 lets get some facts straight.
"Shot tracker shows what u call 'tap in' 3ft 4in. Since when is 3'4' on green speed 12 a 'tap in.' FYI 1 shot for me on Sunday was 300k. Difference between T2 and T4.
"Yes, I did back off because the line didn't feel right. So what! BTW that was the only putt I backed off all day. Also our group was on pace all day! We waited if anything. #getyourfactstraight #sticktoyourownsport #everyshotcounts."
Of all the cross-sport friendships, it doesn't appear this one will be blossoming anytime soon!