MELBOURNE, AUSTRALIA - 22 DE ENERO DE 2019: La campeona del Grand Slam Serena Williams de Estados Unidos durante una conferencia de prensa después de su derrota en el partido de cuartos de final del Abierto de Australia 2019 contra Karolina Pliskova - Foto e imágenes de stock

MELBOURNE, AUSTRALIA - JANUARY 22, 2019: Grand Slam Champion Serena Williams of USA during press conference after her loss in 2019 Australian Open quarter-final match against Karolina Pliskova

MELBOURNE, AUSTRALIA - JANUARY 22, 2019: Grand Slam Champion Serena Williams of USA during press conference after her loss in 2019 Australian Open quarter-final match against Karolina Pliskova

MELBOURNE, AUSTRALIA - JANUARY 22, 2019: Grand Slam Champion Serena Williams of USA during press conference after her loss in 2019 Australian Open quarter-final match against Karolina Pliskova

NEW YORK - AUGUST 26, 2019: Grand Slam Champion Serena Williams of United States during press conference after her victory over Maria Sharapova of Russia in 2019 US Open first round match in New York

MELBOURNE, AUSTRALIA - JANUARY 22, 2019: Grand Slam Champion Serena Williams of USA during press conference after her loss in 2019 Australian Open quarter-final match against Karolina Pliskova

MELBOURNE, AUSTRALIA - JANUARY 22, 2019: Grand Slam Champion Serena Williams of USA during press conference after her loss in 2019 Australian Open quarter-final match against Karolina Pliskova

NEW YORK - SEPTEMBER 8, 2018: 23-time Grand Slam champion Serena Williams of United States during press conference after her loss at 2018 US Open final match against Naomi Osaka

NEW YORK - SEPTEMBER 6, 2018: 23-time Grand Slam champion Serena Williams of United States during press conference after her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 1, 2016: Twenty two times Grand Slam champion Serena Williams of United States during press conference at the Billie Jean King National Tennis Center during US Open 2016

NEW YORK - AUGUST 26, 2019: Grand Slam Champion Serena Williams of United States during press conference after her victory over Maria Sharapova of Russia in 2019 US Open first round match in New York

NEW YORK - SEPTEMBER 1, 2019: Grand Slam champion Serena Williams in action during her 2019 US Open round of 16 match at Billie Jean King National Tennis Center

MELBOURNE, AUSTRALIA - JANUARY 26, 2019: 2019 Australian Open Champion Naomi Osaka of Japan during press conference following her win in the final match at Rod Laver Arena in Melbourne Park

MELBOURNE, AUSTRALIA - JANUARY 21, 2019: 23-time Grand Slam Champion Serena Williams of United States in action during her round of 16 match at 2019 Australian Open in Melbourne Park

NEW YORK - SEPTEMBER 8, 2018: 2018 US Open finalist Serena Williams of United States in tears during trophy presentation after her final match loss against Naomi Osaka

NEW YORK - SEPTEMBER 8, 2018: 23-time Grand Slam champion Serena Williams of United States during press conference after her loss at 2018 US Open final match against Naomi Osaka

NEW YORK - SEPTEMBER 2, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23, 2018: 23-time Grand Slam champion Serena Williams participates at Arthur Ashe Kids Day before 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23: Seventeen times Grand Slam champion Serena Williams practices for US Open 2014 at Billie Jean King National Tennis Center on August 23 , 2014 in New York

MELBOURNE, AUSTRALIA - JANUARY 26, 2016: Twenty one times Grand Slam champion Serena Williams in action during her quarter final match at Australian Open 2016 at Australian tennis center in Melbourne