"When I realized I was pregnant, I was like, 'Oh, my god! How am I going to play?'" Williams says in the trailer released this week. "I put so much pressure on myself -- I want to make sure that I'm the best. I don't know if there's anything left for me in tennis, but I'm not done yet."
Besides listing the many titles Williams wears -- record-breaker, icon, mogul, wife, mother -- the brief clip shows Williams working out while pregnant, spending time with baby Alexis Olympia, exchanging vows with her husband, Reddit co-founder Alexis Ohanian, making business decisions for her brand and, of course, smashing balls on the tennis court.
"After competing in Abu Dhabi I realized that although I am super close, I'm not where I personally want to be," Williams said in a statement at the time, according to The Associated Press.
Earlier, Williams opened up about the complications she endured during Alexis’ birth, telling Vogue magazine she underwent multiple operations after sustaining a pulmonary embolism the day after she gave birth via emergency C-section.
The 23-time Grand Slam winner said she spent the first six weeks of motherhood unable to get out of bed.