Barty powers into fourth round at Australian Open

Top-ranked Ash Barty advanced to the fourth round of the Australian Open with a 6-2, 6-3 win over 30th-seeded Camila Giorgi.

Ashleigh Barty celebrates after winning the match against Italy's Camila Giorgi during their women's singles match on day five of the Australian Open.   -  AFP

Top seed Ashleigh Barty kept her unblemished record this year intact with a straight-sets demolition on Friday of Camila Giorgi to inch closer to a maiden Australian Open title.

The world number one is now 7-0 for the season after winning the Adelaide International and is yet to drop a set, easing past the Italian 30th seed 6-2, 6-3 on Rod Laver Arena.

She will face young American Amanda Anisimova in a blockbuster fourth-round clash.

"It was a pretty good performance," said the Australian Barty, 25, describing it as "clean".

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"The way she hits the ball and covers the court, it was my job to get her off the baseline ... I am able to use my slice effectively."

Barty surrendered just three games in total to race through the first two rounds against qualifiers, spending less than two hours on court, and came into the Giorgi showdown with plenty in the tank.

On paper, the aggressive 30-year-old was a more serious threat, but not for the world number one and reigning Wimbledon champion.

Barty went 2-0 ahead with Giorgi double-faulting on breakpoint, and while the Italian earned four break points at 2-4, the Australian saved them all then broke again to take the first set in 32 minutes.

An invincible Barty has not lost a service game for six straight matches.

More costly errors from Giorgi ensured the Australian got the crucial break in game six of the second set before closing out the match in 61 minutes for a routine win.

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