Tom Brady, Matthew McConaughey serve love as stars hit US Open tennis finals

Nicole Kidman and husband Keith Urban watch the men's finals at the US Open. (Mike Stobe)

Tom Brady watches the men's singles semi-finals match between Spain's Carlos Alcaraz and Russia's Daniil Medvedev. (Gotham/GC Images)

Matthew McConaughey cheered during the men's final at the US Open Sunday night. (Sarah Stier)

Leonardo DiCaprio watched the men's final in a box with actress Sara Gilbert. (Sarah Stier)

Kylie Jenner and Timothée Chalamet wrapped their arms around each other during the US Open men's final. (Sarah Stier)

Alec Baldwin and wife Hilaria caught a match at the US Open. (Gotham/GC Images)

Justin Timberlake proved to be a fan of the game as he watched Novak Djokovic defeat Daniil Medvedev at the US Open. (Matthew Stockman)

Jerry and Jessica Seinfeld chat between points at the men's final on Sunday afternoon in New York. (Kena Betancur)

Jon Hamm and wife Anna Osceola watched Djokovic win the US Open Sunday. (Sarah Stier)

Amanda Seyfried celebrated a point while watching Coco Gauff play Aryna Sabalenka during the US Open women's finals on Saturday. (Gotham/GC Images)

Billy Crudup and Naomi Watts catch a point during the match.  (Gotham/GC Images)

Mariska Hargitay takes her seat at the US Open Women's final match. (Gotham/GC Images)

Laura Dern and Shonda Rhimes look captivated by the US Open Women's Final between Coco Gauff and Aryna Sabalenka. (Gotham/GC Images)

Charlize Theron claps while watching women's final game with Coco Gauff vs. Aryna Sabalenka. (Gotham/GC Images)

Amanda Seyfried and Rachel Brosnahan (front row) watch the US Open women's final on Saturday along with Ariana DeBose, Cara Delevingne and Mindy Kaling (second row). (Gotham/GC Images)

Diane Keaton and Ariana Debose throw their hands in the air during a break in play. (Gotham/GC Images)

Nicole Kidman watched the US Open women's and men's final matches over the weekend. (Gotham/GC Images)

"Grey's Anatomy" star Ellen Pompeo and husband Chris Ivery cheered on Coco Gauff at the women's final during the US Open. (Gotham/GC Images)