An emotional Roger Federer, left, of Team Europe sits alongside his playing partner Rafael Nadal after their Laver Cup doubles match against Team World's Jack Sock and Frances Tiafoe at the O2 arena in London, Friday, Sept. 23, 2022. Federer's losing doubles match with Nadal marked the end of an illustrious career that included 20 Grand Slam titles and a role as a statesman for tennis. (AP Photo/Kin Cheung)