The players returned to the 120-yard 17th at Juno Beach, Florida's Seminole Golf Club for a closest-to-the-pin challenge to claim the final prize.
Wearing microphones that captured their smack talk and frustrations, caddie-less competitors McIlroy and Johnson faced off against Rickie Fowler and Matthew Wolff, carrying their own clubs and adhering to social distancing procedures after undergoing a battery of tests and screenings.
McIlroy added, "It's just not the way a leader should act, and there is a bit of diplomacy that you need to show, and I just don't think he's shown that, especially in these times".
It's set to return June 11 at Colonial, with no fans in attendance.
McIlroy, who will take part in all three events, believes golf can safely resume during the COVID-19 outbreak.
"We're in the midst of something that's pretty serious right now, and the fact that he's trying to politicise it and make it a campaign rally, saying that (the US) administers the most tests in the world like it's a contest", McIlroy said.
Here's all you need to know ahead of Sunday.
President Donald Trump joined the NBC broadcast Sunday of "TaylorMade Driving Relief".
The charity event will be held on Sunday, May 17, with play scheduled to run between 2 p.m. ET and 6 p.m. ET.
Where is TaylorMade Driving Relief?
He wants golf events like The Masters to return with spectators "practically standing on top of each other", but in the next breath said last week's closed-door mixed martial arts card in Florida didn't miss the fans.
The event will be simulcast on NBC and Golf Channel. The tour has said it will not allow fans for at least a month, perhaps longer depending on how it goes. McIlroy, hitting last, dropped one just inside of Wolff and earned him and Johnson the final $1.1 million. The lowest ball for each team counts, and if there is a tie among the two teams, the money amount on the line carries over to the next hole.
Fowler's seven birdies were worth $270,000 in a separate fund from Farmers Insurance, while McIlroy made four birdies in regulation worth $175,000 and Wolff had three birdies for $135,000.
Each twosome with begin with $500,000 in their "bank". The first six holes will be worth $50,000 each, while holes from the seventh through to the 16th will be worth $100,000 each.
Fowler, with a birdie barrage in the middle of the round (four in six holes), appeared to be carrying him and Wolff to victory. If scores are tied after the 18th hole, the four players will return to the par-3 17th and play it from 125 yards out to determine the victor.
McIlroy, the No 1 player in the world, blasted his former golfing partner Trump on a podcast episode for the latter's handling of the Covid-19 pandemic.
McIlroy and Johnson are 2/3 favorites to win the first skin, while Fowler and Wolff are 6/5 outsiders.