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Michael Mmoh of the US hits a return against Spain's Roberto Bautista Agut during their men's singles match on day three of the Australian Open tennis tournament in Melbourne on January 22, 2020. (Photo by DAVID GRAY / AFP) / IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE (Photo by DAVID GRAY/AFP via Getty Images)

Michael Mmoh of the US hits a return against Spain's Roberto Bautista Agut during their men's singles match on day three of the Australian Open tennis tournament in Melbourne on January 22, 2020. (Photo by DAVID GRAY / AFP) / IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE (Photo by DAVID GRAY/AFP via Getty Images)