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UNIVERSITY PLACE, WA - JUNE 20: (L-R) Dustin Johnson of the United States and Branden Grace of South Africa shake hands on the 18th green during the third round of the 115th U.S. Open Championship at Chambers Bay on June 20, 2015 in University Place, Washington. (Photo by Harry How/Getty Images)

UNIVERSITY PLACE, WA - JUNE 20:  (L-R) Dustin Johnson of the United States and Branden Grace of South Africa shake hands on the 18th green during the third round of the 115th U.S. Open Championship at Chambers Bay on June 20, 2015 in University Place, Washington.  (Photo by Harry How/Getty Images)