During an appearance on the finance show Kneading Dough, part of LeBron James's Uninterrupted network, Williams recalled the experience of making a million-dollar bank for the first time.
"Not once did I think about a check," the 23-time Grand Slam champion shared. "I've actually never played for money—I just thought you would go out there and hold a trophy."
As for her many titles and accolades, the all-star athlete credited them to one simple factor: "I just played for the love of the sport."
The mom-to-be, who admitted that she "never ever ever felt broke," attributed her smart money skills to her parents and her upbringing.
"Looking back, I'm like, wow, we lived in a two-bedroom house with seven people ... I don't know how my parents were able to make me feel that way, but they did, and that was something really special," she said. "So I never felt when I came into money that I needed to go buy this [or that] because I never wanted it, so it was a great way [to grow up]."
So when the time came to cash in her first million dollars, the 35-year-old hilariously recalled being at a loss on the protocol.
"I never touched [the money]—just put it in the bank," she recalled. "And I remember I went through the drive-thru to deposit my check, and then they were like, 'I think you need to come in for this,' and so I ended up going inside."
It's safe to say that the lesson she learned that day has been used many times over since then.