The world No. 1 is seeking a third Australian Open title in a row. This is what makes her the best player in the world.

Australian Open runner-up Aryna Sabalenka could be facing a big fine for her post-match reaction in the final. And Novak Djokovic has been called out for posting his injury scans at a time when the tennis world was celebrating Madison Keys' maiden grand slam triumph.

Aryna Sabalenka has come up one match shy in her bid for a third consecutive Australian Open title. After 6-3, 2-6, 7-5 loss to Madison Keys in the final on Saturday, Sabalenka threw her racket on the sideline,