Naomi Osaka wasn't lying when she said she would be back for the 2024 Australian Open ... 'cause the tennis superstar looks like she's preppin' for it already -- during her pregnancy!!
The 4-time Grand Slam singles champ shared three Instagram videos of her workout on Monday, a month after she revealed to the world that she was pregnant.
You can see Osaka hasn't lost a step as the 25-year-old shows her powerful backhand on the tennis court. She also had a sweat sesh on the beach -- all while carrying a baby in her belly!