USA's Jason Dufner fist bump Nadine Moze as Amanda Dufner, Amy Mickelson and Phil Mickelson looks on during the Day 1 Four-Ball Matches of The Presidents Cup.

USA's Jason Dufner fist bump Nadine Moze as Amanda Dufner, Amy Mickelson and Phil Mickelson looks on during the Day 1 Four-Ball Matches of The Presidents Cup.