Defending champion Aryna Sabalenka knocks out teenager Mirra Andreeva on Rod Laver Arena; Coco Gauff battles back to set up showdown with Spaniard Paula Badosa; watch all the action from the ATP and WTA Tours on Sky Sports Tennis and Sky Sports+,

With a 6-1, 6-2 victory over 14th-seeded Mirra Andreeva to open play Sunday at Rod Laver Arena, Aryna Sabalenka advanced to the quarterfinals of the Australian Open. She'll be joined there by Coco Gauff.

Aryna Sabalenka cruises through as Coco Gauff battles into last eight - Sabalenka brushed aside Mirra Andreeva 6-1 6-2 for her 18th win in a row at Melbourne Park.