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GULLANE, SCOTLAND - JULY 18: Tiger Woods of the United States looks on with caddie Joe Lacava during the first round of the 142nd Open Championship at Muirfield on July 18, 2013 in Gullane, Scotland. (Photo by Warren Little/R&A/R&A via Getty Images)

Tiger Woods of the United States looks on with caddie Joe Lacava during the first round of the 142nd Open Championship at Muirfield on July 18, 2013 in Gullane, Scotland.