"I try to be the best that I can be every day," she says. "I have bad days. I had a bad day the other day. I hit for only, like, 30 minutes, and I stormed off the court. But that was the best I could do on that day."
When asked whether or not she's the world's greatest athlete, Williams' response is measured. "So am I the greatest? I don't know," she tells Glamour. "I'm the greatest that I can be."
She adds, "If I'm not playing well, I do get down on myself because I am a perfectionist."
Williams doesn't only exhibit prowess on the tennis court. She's also been highly successful as a businesswoman with a number of ventures from tech to fashion.
Soon, both Ohanian and Williams will have their hands full with a different task: raising their first child.
"She's very good at a lot of things," says Ohanian in a recent interview on CNBC's "Squawk Box," "and well on her way to being an awesome mom too."
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