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American McDonald beats del Potro in Delray Beach Open

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American McDonald beats del Potro in Delray Beach Open

USA TODAY Sports

DELRAY BEACH, Fla. (AP) — American Mackenzie McDonald beat No. 1-seeded Juan Martin del Potro on Friday night in the quarterfinals of the Delray Beach Open, 6-4, 3-6, 7-6 (5). McDonald, ranked 84th, advanced to his first ATP Tour semifinal. Del Potro was playing in his first event after missing four …

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