Jon Rahm was the recipient of a tweet from LIV Golf following his Masters win.
Rahm was on the receiving end of many congratulatory messages after his sensational triumph at the tradition unlike any other.
Koepka, LIV's only two-time individual winner, was the leader heading into Sunday's final round with a two-stroke advantage over Rahm.
The two played the final 36 holes together in what largely appeared to be a two-horse race after the cut.
But Koepka's final round 3-over 75 paved the way for Rahm to win the green jacket.
Despite the ongoing tension between Greg Norman's LIV Golf and the PGA Tour, any animosity was briefly swept aside after Rahm claimed his second major.
Last October, Rahm became the first PGA Tour star to publicly congratulate a 'rebel' player when he paid tribute to his fellow Spaniard Eugenio Lopez-Chacarra for capturing his maiden professional victory in Bangkok, saying:
Rahm made the comment on a very public stage after he captured his home Open for the third time, matching another one of Seve Ballesteros's records.
The two-time major champion has consistently been neutral over LIV Golf since its emergence last June.
He has stated he has maintained a close personal relationship with Mickelson. Rahm shares an agency with Lefty and he views the six-time major champion as a mentor.
Although he did push back on Lefty's comments when he previously claimed he saw the PGA Tour trending downward.
"Man, I love Phil," Rahm said. "But I don't know what he's talking about. I really don't know why he said that."
With Rahm's Masters win, he reclaimed the World No. 1 spot that was previously held by the defending champion Scottie Scheffler.
A month from now the two tours will face off against each other for a second time in 2023 with the PGA Championship at Oak Hill Country Club.