Ash Barty's dominant form at the Australian Open continued as the world number one saw off Amanda Anisimova to reach the quarter-finals.

Anisimova shocked 2021 champion Naomi Osaka in the last round but the in-form Barty proved a step too far on Sunday.

Barty had not dropped a set in any of her previous matches and the Australian continued that trend with a 6-4 6-3 triumph that took just 74 minutes.

The 25-year-old missed five chances to break before she finally nosed herself ahead in a tightly contested first set when Anisimova went long.

Anisimova made the same mistake in the next game, failing to grasp the opportunity for an immediate response, and Barty struck a forehand winner to claim the set.

World number 60 Anisimova responded by racing into a 40-0 lead at the start of the second set, only for some sloppy shots to allow Barty to haul herself level.

The American held her nerve though and looked to be right back into it when she broke Barty in the next game.

Yet two-time major winner Barty hit straight back, with a missed backhand from Anisimova gifting her a reprieve, and she did not look back, holding serve before breaking again to go 4-3 ahead.

Anisimova saved two match points in her win over Osaka, yet another overhit backhand sent Barty through to a tie against Jessica Pegula at the first time of asking.