Overall score: United States 4-1/2 Internationals 3-1/2
Phil Mickelson/Keegan Bradley beat Jason Day (Australia)/Graham DeLaet (Canada) 4&3
Bill Haas/Hunter Mahan lost to Ernie Els (South Africa)/Brendon de Jonge (Zimbabwe) 4&3
Steve Stricker/Jordan Spieth three up on Branden Grace (South Africa)/Richard Sterne (South Africa) after 15 holes
Webb Simpson/Brandt Snedeker all square with Angel Cabrera (Argentina)/Marc Leishman (Australia) after 14 holes
Matt Kuchar/Tiger Woods three up on Louis Oosthuizen (South Africa)/Charl Schwartzel (South Africa) after 13 holes
Zach Johnson/Jason Dufner five down to Adam Scott (Australia)/Hideki Matsuyama (Japan) after 12 holes
Holders the U.S. led by 3-1/2 points to 2-1/2 after Thursday's opening fourball matches.