Photos: Celebrity sightings at the US Open 2021 Actors Brad Pitt and Bradley Cooper watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Sarah Stier/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actress Lupita Nyong'o (right) watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Elsa/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actor Leonardo DiCaprio and his girlfriend, model/actress, Camila Morrone, watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Sarah Stier/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Director Spike Lee watches the match between Serbia's Novak Djokovic and Russia's Daniil Medvedev during their 2021 US Open Tennis tournament men's final at the USTA Billie Jean King National Tennis Center in New York, on September 12, 2021. (KENA BETANCUR/AFP via Getty Images)
Photos: Celebrity sightings at the US Open 2021 TV personalities Savannah Guthrie and Jenna Bush talk with former tennis player Stan Smith as they watch play during the Women's Singles final match between Emma Raducanu of Great Britain and Leylah Annie Fernandez of Canada on Day Thirteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 11, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Elsa/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actor Ben Stiller watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Matthew Stockman/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actress Kate Hudson and TV personality Gayle King watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Elsa/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Laverne Cox, right, talks with Vera Wang during play between Novak Djokovic, of Serbia, and Daniil Medvedev, of Russia, at the men's singles final of the US Open tennis championships , Sunday, Sept. 12, 2021, in New York. (AP Photo/Elise Amendola)
Photos: Celebrity sightings at the US Open 2021 Actors Hugh Dancy and Claire Danes watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Elsa/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actors Joseph Mazzello and Rami Malek watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Matthew Stockman/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Maria Sharapova, tennis player, watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Sarah Stier/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Henrik Lundqvist, hockey player, watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Matthew Stockman/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actor Paul Wesley watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Sarah Stier/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actress Mariska Hargitay (center), her son August Miklos Friedrich Hermann (left) and tv personality Gayle King (right) watch the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Matthew Stockman/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Actor Alec Baldwin watches the Men's Singles final match between Daniil Medvedev of Russia and Novak Djokovic of Serbia on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Matthew Stockman/Getty Images)
Photos: Celebrity sightings at the US Open 2021 Michael Bloomberg, right, watches play between Emma Raducanu, of Britain, and Leylah Fernandez, of Canada, during the women's singles final of the US Open tennis championships, Saturday, Sept. 11, 2021, in New York. (AP Photo/Seth Wenig)
Photos: Celebrity sightings at the US Open 2021 Rod Laver, former tennis player, waves to the crowd as Felix Auger-Aliassime of Canada plays against Daniil Medvedev of Russia during their Men’s Single semifinal match on Day Twelve of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 10, 2021, in the Flushing neighborhood of the Queens borough of New York City. (Al Bello/Getty Images)