Oct 6 (Reuters) - Pairings for Sunday's concluding singles matches at the Presidents Cup between the United States and the Internationals at Muirfield Village Golf Club in Dublin, Ohio (U.S. pairs first): Steve Stricker v Ernie Els (South Africa) Hunter Mahan v Hideki Matsuyama (Japan) Jason Dufner v Brendon de Jonge (Zimbabwe) Brandt Snedeker v Jason Day (Australia) Jordan Spieth v Graham DeLaet (Canada) Bill Haas v Adam Scott (Australia) Zach Johnson v Branden Grace (South Africa) Ma
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