MIAMI GARDENS, FLORIDA - MARCH 23: Alexander Zverev of Germany returns a shot to David Ferrer of Spain during the Miami Open Presented by Itau at Hard Rock Stadium March 23, 2019 in Miami Gardens, Florida.(Photo by Matthew Stockman/Getty Images)
MIAMI GARDENS, FLORIDA - MARCH 23: Alexander Zverev of Germany returns a shot to David Ferrer of Spain during the Miami Open Presented by Itau at Hard Rock Stadium March 23, 2019 in Miami Gardens, Florida.(Photo by Matthew Stockman/Getty Images)