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Robin Hase, from the Netherlands, stretches to retourn a drop shot during his second match round against Juan Martin Del Potro, from Argentina. in Miami, on March 23, 2018. (Photo by Manuel Mazzanti/NurPhoto via Getty Images)

Robin Hase, from the Netherlands, stretches to retourn a drop shot during his second match round against Juan Martin Del Potro, from Argentina. in Miami, on March 23, 2018. (Photo by Manuel Mazzanti/NurPhoto via Getty Images)