Serena Williams reacts during her match against Rebecca Peterson, of Sweden, at the Miami Open tennis tournament, Friday, March 22, 2019, in Miami Gardens, Fla. (AP Photo/Lynne Sladky)

Serena Williams reacts as a ball hit by Rebecca Peterson, of Sweden, is out of bounds during the Miami Open tennis tournament, Friday, March 22, 2019, in Miami Gardens, Fla. (AP Photo/Lynne Sladky)

Serena Williams returns to Rebecca Peterson, of Sweden, during the Miami Open tennis tournament, Friday, March 22, 2019, in Miami Gardens, Fla. (AP Photo/Lynne Sladky)