Azevedo described CiCi's strengths as "her aggressiveness from the baseline, a great forehand, a great mover and great competitor. Her presence on the court is not normal for a 15-year-old."
No, normalcy comes off the court, with her parents -- dad Gordon, who works for a private equity fund in San Francisco, and mother Lori, who played junior tennis and then at Indiana University, but stayed in her New York hotel room Monday, too nervous to come to the match.
It was left to Gordon to answer questions. Asked about his role, he said, "I carry bags and pick up balls."
His daughter takes a day off from tennis about once every 10 days, he said, though he'd like it to be closer to once a week. But like most dads of teenage daughters, he has only so much say.
"I'm told I cannot sigh and cannot move or say anything," he said of his daughter's instructions during matches. "She knows when I sigh. I have to sit like a sphynx."
If you forget how young 15 is, you are quickly reminded when Bellis says her first memory of the US Open was when she was 6 or 7, watching Maria Sharapova play. That was 2006.
At that point she played soccer and tennis. At 10, she chose tennis. "That's when I really focused on practicing a lot, practicing really hard to get to this point and everything," she said.
She did not, however, expect this.
"It's crazy to think I'm actually here right now with all these other people," Bellis said. "I mean, I never thought I would be practicing or sharing a court with, you know, a player I watch on TV. I mean, it's crazy. But I love it."