Open champion Cameron Smith has won his first LIV Golf trophy and four million dollars (£3.5m) in prize money in just his second start in the competition.
The Australian, who quit the PGA Tour for the controversial Saudi-backed tournament after becoming world number two – the highest-ranked player to join – closed with a three-under 69 for a three-stroke win at the Chicago Invitational.
The 29-year-old was briefly threatened in the third and final round at Rich Harvest Farms but restored his lead with a birdie on the 17th to ensure neither Dustin Johnson nor Peter Uihlein could catch him.
The Americans finished tied for second after each birding the par-5 18th hole. Johnson finished with 70 while fellow countryman Uihlein finished with 69 – both earning $1,812,500 (£1,589,417) from the $20m (£17.5m) scholarship
Johnson is the only player in the 48-man field to finish in the top 10 at every LIV Golf event and remains one of the most important players to sign up.
The 38-year-old is a two-time major champion who has been world number one longer than any player since Tiger Woods.
The next LIV Golf event will take place in three weeks in Bangkok.
The series does not return to America until the final team event at Trump Doral near Miami in October.
In addition to Smith and Johnson, the Saudi-backed rebel tour has drawn American figures such as Brooks Koepka and Bryson DeChambeau.