![Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (R) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (R) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in](https://c8.alamy.com/comp/D6P23P/tennis-player-angelique-kerber-from-germany-talks-to-captain-of-the-D6P23P.jpg)
Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (R) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in
![United States' Madison Keys, right, talks to coach Kathy Rinaldi during her playoff-round Fed Cup tennis match against Switzerland's Viktorija Golubic, Saturday, April 20, 2019, in San Antonio. (AP Photo/Darren Abate Stock United States' Madison Keys, right, talks to coach Kathy Rinaldi during her playoff-round Fed Cup tennis match against Switzerland's Viktorija Golubic, Saturday, April 20, 2019, in San Antonio. (AP Photo/Darren Abate Stock](https://c8.alamy.com/comp/2MK46PB/united-states-madison-keys-right-talks-to-coach-kathy-rinaldi-during-her-playoff-round-fed-cup-tennis-match-against-switzerlands-viktorija-golubic-saturday-april-20-2019-in-san-antonio-ap-photodarren-abate-2MK46PB.jpg)
United States' Madison Keys, right, talks to coach Kathy Rinaldi during her playoff-round Fed Cup tennis match against Switzerland's Viktorija Golubic, Saturday, April 20, 2019, in San Antonio. (AP Photo/Darren Abate Stock
![Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (L) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (L) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in](https://c8.alamy.com/comp/D6P23N/tennis-player-angelique-kerber-from-germany-talks-to-captain-of-the-D6P23N.jpg)
Tennis player Angelique Kerber from Germany talks to captain of the German Fed Cup team Barbara Rittner (L) during the Fed Cup relegation match against Serbia's Ana Ivanovic at Porsche Arena in
![United State's Madison Keys, left, listens to captain Kathy Rinaldi, right, during a first-round Fed Cup tennis match against Australia's Kimberly Birrell in Asheville, N.C., Saturday, Feb. 9, 2019. (AP Photo/Chuck Burton United State's Madison Keys, left, listens to captain Kathy Rinaldi, right, during a first-round Fed Cup tennis match against Australia's Kimberly Birrell in Asheville, N.C., Saturday, Feb. 9, 2019. (AP Photo/Chuck Burton](https://c8.alamy.com/comp/2MKHEGE/united-states-madison-keys-left-listens-to-captain-kathy-rinaldi-right-during-a-first-round-fed-cup-tennis-match-against-australias-kimberly-birrell-in-asheville-nc-saturday-feb-9-2019-ap-photochuck-burton-2MKHEGE.jpg)