This reference is not random. Justin Kuritzkes got the idea for Challengers (2024), starring Zendaya, from the controversial 2018 US Open final between Serena Williams and Naomi Osaka, where a penalty was given for illegal coaching from the sidelines.
Watching players and coaches try to communicate without using words in front of a massive crowd gave him the idea for a cinematic story about unspoken tension and relationships.
Before writing the script, he spent years researching tennis, eventually diving deep into the Challenger tour, which inspired the unique lower-stakes framing and emotional desperation of the plot.