The United States, led by Mark Calcavecchia, routed Australia and New Zealand, 10-2, Friday in the Four Tours World Championship of Golf at Inagi, Japan.
The Europeans defeated Japan, 9-3, in the round-robin tournament played on the 7,071-yard Tokyo Yomiuri Country Club course.
After two rounds, the United States leads with 16 points, one ahead of Europe. Australia-New Zealand is third with 10 and Japan is fourth with seven.
Calcavecchia shot a five-under-par 67 to beat Brian Jones, who shot 70; Ken Green beat Craig Parry, 67-71; Chip Beck beat Greg Norman, 69-71, and Curtis Strange beat Ian Baker-Finch, 68-74.
Payne Stewart tied Wayne Grady at 69. Tom Kite also shot 69 and tied Peter Senior.
At Otsu, Japan, Cindy Rarick of the United States and Laura Davies of Britain each shot five-under-par 67s to tie for the lead after the first round of the Mazda Japan women's tournament.
Deborah McHaffie shot 68 and was alone in third place. At 69 were Chris Johnson and Dawn Coe.