United States Fed Cup team, from left, Bethanie Mattek-Sands, Shelby Rogers, CoCo Vandeweghe and Lauren Davis runs a lap around the court after they defeated the Czech Republic in semifinal tennis match, Sunday, April 23, 2017, in Wesley Chapel, Fla. (AP Photo/John Raoux)
United States' Shelby Rogers returns a shot to Czech Republics's Katerina Siniakova during a Fed Cup semifinal tennis match, Saturday, April 22, 2017, in Wesley Chapel, Fla. (AP Photo/John Raoux)
Czech Republic's Katerina Siniakova waves to fans after she defeated United States' Shelby Rogers during a Fed Cup semifinal tennis match, Saturday, April 22, 2017, in Wesley Chapel, Fla. (AP Photo/John Raoux)
United States' Shelby Rogers looks to return a shot to Czech Republic's Katerina Siniakova during a Fed Cup semifinal tennis match, Saturday, April 22, 2017, in Wesley Chapel, Fla. (AP Photo/John Raoux)
Czech Republic's Katerina Siniakova returns a shot to United States' Shelby Rogers during a Fed Cup semifinal tennis match, Saturday, April 22, 2017, in Wesley Chapel, Fla. (AP Photo/John Raoux)
Angelique Kerber, of Germany, waves to the crowd after defeating Shelby Rogers, of the United States, 6-4, 7-5 during the Miami Open tennis tournament, Sunday, March 26, 2017, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)
Angelique Kerber, of Germany, hits a return to Shelby Rogers during the Miami Open tennis tournament, Sunday, March 26, 2017, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)