As the announcer welcomes everyone to the broadcast, a low rumble of sound starts to build. Initially, it sounds like cheering. But as host Tom Rinaldi pauses, the booing gets unmistakingly clearer.
After enduring it for 30 seconds, a then 20-year-old Osaka pushes her cap forward to shield her eyes. Noticing her sadness, Williams puts her arm around Osaka as the young up-and-coming tennis star sobs.
Watch the 2018 US Open trophy ceremony with winner Naomi Osaka and runner-up Serena Williams. Post continues after video.
Osaka is being booed for winning. It's her first Grand Slam win. Her moment. But the crowd is there for Williams. During the match, Williams had accused the chair umpire of sexism after being given a penalty, and her fans are showing their support and outrage at her loss.
Playing that final against her idol, Williams, was Osaka's childhood dream. But instead of answering Rinaldi's question of, "how does the dream compare to reality?" a teary Osaka tells the crowd: "I'm going to sort of defer from your question, I'm sorry... I know that everyone was cheering for her, and I am sorry it had to end like this. I just want to say thank you for watching the match."