Semifinal match during the Miami Open

KEY BISCAYNE, FL – MARCH 30: John Isner of the United States shakes hands at the net after his straight sets victory against Juan Martin Del Potro of Argentina in their semifinal match during the Miami Open Presented by Itau at Crandon Park Tennis Center on March 30, 2018 in Key Biscayne, Florida. Clive Brunskill/Getty Images/AFP