Photos from the opening day of Walker Cup action at Royal County Down. To view all photos, visit BBC.com .
Rory McIlroy drives off the ninth in Saturday’s opening foursomes at Royal County Down.
Dustin Johnson and his partner Colt Knost let slip a winning chance after being two up with three to play.
Webb Simpson reacts after holing a stunning 35-yard putt on the 18th to earn an unlikely foursomes half.
Photos courtesy of BBC.com