Peter Uihlein seized a one-stroke lead to carry into the final round of LIV Golf Jeddah after a seven-under-par 63 in Saudi Arabia on Saturday.
The American leapfrogged compatriot Brooks Koepka at the top of the leaderboard after an eagle and birdie on his final two holes took him to 12 under.
The only blot on his copybook at the Royal Greens Golf Club was a double bogey at the par-four 13th.
Koepka, who led after the first day of competition on Friday, carded a three-under round of 67 to stay in touch.
Two shots further back are South Africa's Charl Schwartzel and Sergio Garcia, with the Spaniard posting a bogey-free 64.
The inaugural individual LIV Golf champion Dustin Johnson stood five shots off the lead after a round of 65.
It was a disappointing day for Henrik Stenson, meanwhile, with the Swede sitting in last place after going round in 75, five over and for the tournament.