Johnson started birdie - birdie , only to come undone with a double bogey from the trees and rough on No. 9 .
So did his playing partner , British Open champion Zach Johnson , in a pairing of the major champions this year .
champion started birdie - birdie , only to come undone with a double bogey from the trees and rough on No. 9 .
So did his playing partner , British Open champion Zach Johnson , in a pairing of the major champions this year .