As Sabalenka winds up again, Nike provides a tongue-in-cheek warning: “The following is a test. Do not attempt to recreate ... cheeky way of visualizing her signature power.

Yet those swiveling heads might want to simply stop for a minute. Sabalenka showed off some striking looks along the beach.

Aryna Sabalenka and Jessica Pegula will square off for the ninth time. Here's everything you need to know about the showdown.