WATCH: Osaka and friends post a dance video on vacation

Naomi Osaka is living it up this off-season in Turks and Caicos with her sister Mari and boyfriend YBN Cordae. The group, along with some more friends, put together a semi-coordinated dance just for fun.

Mari Osaka shows she's got some rhythm, while her little sister has some stops and starts, including completely stopping to take a sip of water in the middle of the video, which was set to Missy Elliot's "Work It".

An athlete knows when to hydrate.

Osaka is having some much-needed time off after a packed 2019 season saw her win her second Grand Slam in Melbourne, and pick up titles in Osaka and Beijing.

She's not totally ignoring the courts though, having taught Cordae a little lesson earlier in their vacation.  Her sister Mari can also serve as a hitting partner, as she's currently ranked No. 328.

Osaka finished the season at No. 3.