The United States held a two stroke lead over Ireland and Germany midway through the final round of the Omega Mission Hills World Cup as four birdies saw Matt Kuchar and Gary Woodland close in on the trophy.
Starting the closing foursomes two shots behind overnight leaders Ireland, Kuchar and Woodland got off to a great start with birdies at the first and second before picking up further shots at the sixth and seventh to move to 23 under par through ten holes.
Rory McIlroy and Graeme McDowell, meanwhile, were level par for the day as birdies at the third and fifth were offset by bogeys at the first and sixth to remain 21 under par at the turn, level with Germany.
Following Saturday's 61 in the fourballs, Martin Kaymer and Alex Cejka could only pick up shots at the second and ninth as they pursued the Americans.
Netherlands lie fourth on 20 under par after playing 11 holes in three under while England, Wales and Scotland were among the group at 19 under.
Welsh duo Rhys Davies and Jamie Donaldson collected four birdies over their opening ten holes while Scottish pair Martin Laird and Stephen Gallacher carded five birdies and a bogey through 12 holes.
Justin Rose and Ian Poulter were enjoying a strong finish to the tournament as England climbed the leaderboard with seven birdies and a bogey.
