Serena Williams at a public appearance for NIKE Unveiles 2009 US OPEN Looks, 23rd Street and Broadway in Manhattan, New York, NY August 26, 2009. Photo By: Rob Kim/Everett Collection - Stockfoto’s en -afbeeldingen

NEW YORK - AUGUST 27, 2019: Professional tennis player Taylor Townsend of United States in action during her 2019 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: Professional tennis player Taylor Townsend of United States in action during her 2019 US Open first round match at Billie Jean King National Tennis Center

RIO DE JANEIRO, BRAZIL - AUGUST 7, 2016: Olympic champion Serena Williams of United States plays with Wilson racquet during first round match of the Rio 2016 Olympic Games at the Olympic Tennis Centre

NEW YORK- AUGUST 30: Grand Slam champion Serena Williams during third round match at US Open 2014 against Varvara Lepchenko at Billie Jean King National Tennis Center on August 30, 2014 in New York

NEW YORK - AUGUST 30, 2016: Grand Slam champion Venus Williams in action during her first round match at US Open 2016 at Billie Jean King National Tennis Center 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

NEW YORK - AUGUST 31, 2015: Twenty one times Grand Slam champion Serena Williams on practice court at US Open 2015 at National Tennis Center in New York

Venus Williams on location for US Open 2009: Venus Williams vs Vera Dushevina, USTA Billie Jean King National Tennis Center, Flushing Meadows, NY August 31, 2009. Photo By: Gregorio T. Binuya/Everett Collection

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

Venus Williams at a public appearance for Polo Ralph Lauren Legend''s Clinic, SPORTIME Tennis Center At Randall''s Island, New York, NY August 26, 2010. Photo By: Rob Kim/Everett Collection

Venus Williams and Serena Williams at Arthur Ashe Kid's Day at the US OPEN, Arthur Ashe Stadium, New York City, August 28, 2004. (Photo by gbinuya/Everett Collection).

Serena Williams in attendance for WED - US OPEN Tennis Tournament, USTA Billie Jean King National Tennis Center, Flushing, NY, September 03, 2008. Photo by: Rob Rich/Everett Collection

Serena Williams in attendance for SUN - US OPEN Tennis Tournament, USTA Billie Jean King National Tennis Center, Flushing, NY, September 07, 2008. Photo by: Rob Rich/Everett Collection

Venus Williams at the press conference for American Express Summer of ACES Program Kick Off, Pershing Square, New York, NY, August 26, 2005. Photo by: Fernando Leon/Everett Collection

Venus Williams at a public appearance for DIRECT TV ESPN US Open Experience Kick Off Event, Bryant Park, New York, NY August 26, 2009. Photo By: Gregorio T. Binuya/Everett Collection

Maria Sharapova in attendance for US Open 2006 Women''s Finals, USTA National Tennis Center, Flushing, NY, September 09, 2006. Photo by: Rob Rich/Everett Collection

Shannon Elizabeth out and about for US Open 2006 Arthur Ashe Kids'' Day, USTA National Tennis Center, Flushing, NY, August 26, 2006. Photo by: Kristin Callahan/Everett Collection

Gabourey Sidibe at arrivals for 60th Annual ACE Eddie Awards, Beverly Hilton Hotel, Beverly Hills, CA February 14, 2010. Photo By: Michael Germana/Everett Collection

Ellen DeGeneres out and about for US Open 2006 Arthur Ashe Kids'' Day, USTA National Tennis Center, Flushing, NY, August 26, 2006. Photo by: Kristin Callahan/Everett Collection

Mary J. Blige at a public appearance for 2010 Veuve Clicquot Polo Classic, Governors Island, New York, NY June 27, 2010. Photo By: Gregorio T. Binuya/Everett Collection

Gabourey Sidibe at arrivals for 62nd Annual Directors Guild of America Awards - ARRIVALS, Hyatt Regency Century Plaza, Los Angeles, CA January 30, 2010. Photo By: Adam Orchon/Everett Collection

Danai Gurira at arrivals for THE VISITOR Premiere, MoMA - The Museum of Modern Art, New York, NY, April 01, 2008. Photo by: Slaven Vlasic/Everett Collection

Beyonce Knowles on location for Beyonce Knowles Shoots Samsung Television Commercial, New York City, New York, NY, March 08, 2007. Photo by: Kristin Callahan/Everett Collection

Serena Williams at arrivals for Land Rover and Serena Williams VIP Event, Manhattan Automobile Company, New York, NY, August 25, 2005. Photo by: Rob Rich/Everett Collection

Gabby Sidibe at arrivals for LIFE PARTNERS Premiere at 2014 Tribeca Film Festival, The School of Visual Arts (SVA) Theatre, New York, NY April 18, 2014. Photo By: Kristin Callahan/Everett Collection