Sabalenka has won back-to-back titles Down Under, but there are plenty of high-level players that can dethrone her in Melbourne.

The world No. 1 faces a few obstacles, while Coco Gauff is on the upswing and Iga Swiatek and Elena Rybakina hope for some new-coach magic.

US Open champion will play her first match against Sofia Kenin, while Sabalenka faces Sloane Stephens. Where did the other favorites land?

The world No. 3 joins athletes Giannis Antetokounmpo, Michael Phelps and celebrities Ashton Kutcher and Mila Kunis as backers of a new league set to debut January 17.

Her estimated $34.4 million haul landed her just behind Naomi Osaka ($57.3 million) and Serena Williams ($45.9 million) on Forbes' all-time list.