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MIAMI GARDENS, FLORIDA - MARCH 23: Roger Federer of Switzerland hits a backhand against Radu Albot of Moldova in the second round of the men's singles in the Miami Open at the Hard Rock stadium on March 23, 2019 in Miami Gardens, Florida. (Photo by TPN/Getty Images)

MIAMI GARDENS, FLORIDA - MARCH 23: Roger Federer of Switzerland hits a backhand against Radu Albot of Moldova in the  second round of the men's singles in the Miami Open at the Hard Rock stadium on March 23, 2019 in Miami Gardens, Florida. (Photo by TPN/Getty Images)