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Rory McIlroy and Justin Thomas
Rory McIlroy of Northern Ireland and Justin Thomas of the United States joke as they walk off the 1st tee during a practice round prior to the 148th Open Championship held on the Dunluce Links at Royal Portrush Golf Club on July 17, 2019 in Portrush, United Kingdom. (Photo by Warren Little/R&A/R&A via Getty Images)
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Zach Johnson and Jordan Spieth
Zach Johnson of the United States and Jordan Spieth of the United States look on during a practice round prior to the 148th Open Championship held on the Dunluce Links at Royal Portrush Golf Club on July 17, 2019 in Portrush, United Kingdom.