USA's Dustin Johnson walks across the bridge on the 13th hole during a singles match at the Ryder Cup PGA golf tournament Sunday, Sept. 30, 2012, at the Medinah Country Club in Medinah, Ill.

USA's Dustin Johnson walks across the bridge on the 13th hole during a singles match at the Ryder Cup PGA golf tournament Sunday, Sept. 30, 2012, at the Medinah Country Club in Medinah, Ill.