Australian Open champion Novak Djokovic is clicking into gear ahead of Friday's third-round clash with Yoshihito Nishioka in Melbourne.

Djokovic has only dropped one set en route to round three at Melbourne Park, where a record-extending eighth title is up for grabs.

The second seed has already reached a milestone at the year's first grand slam, celebrating his 900th ATP singles match victory.

We take a closer look at Djokovic's form as he eyes another trip to the fourth round at the Australian Open.

Form and results

It was a relentless performance from Djokovic in the second round on Wednesday. After dropping a set and winning in the Australian Open first round for the first time in his career by overcoming tenacious German Jan-Lennard Struff on Monday, Djokovic was a class above midweek. The Serb star won 93 per cent of his first serves in a demolition of Japanese wildcard Tatsuma Ito.

R1: bt Struff 7-6 (7-5) 6-2 2-6 6-1
R2: bt Ito 6-1 6-4 6-2

Next up

Another game, another Japanese opponent for Djokovic. World number 71 Nishioka earned a showdown with the defending champion courtesy of his surprise win again Dan Evans on Wednesday. Djokovic and Nishioka have met once previously via last year's Davis Cup Finals, where the former cruised 6-1 6-2 for Serbia.

Draw

It could be an all-Serbian affair in the fourth round. If Djokovic, as expected, sees off Nishioka, either countryman Dusan Lajovic or Argentina's Diego Schwartzman await. Looking further ahead and last year's semi-finalist Stefanos Tsitsipas - the sixth seed - could be a quarter-final opponent.

What he said

"I do have to keep going. I feel comfortable and confident playing in Australia. History of my results here have been very positive."