Steve Smith on the cusp of more amazing cricket history

Once again Steve Smith is on the cusp of history.

Having drawn comparisons with Don Bradman after a record-breaking Ashes series against England earlier in the year, the former Aussie skipper's attentions now turn to Pakistan.

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Smith's 774 runs at a staggering average of 110.57 almost single-handedly helped Australia retain the Ashes urn.

It also means the 30-year-old is now just 27 runs shy of notching another impressive milestone - 7000 Test runs.

Incredibly, if Smith manages to get the runs on day three against Pakistan at the Gabba, it will see him smash a record that has stood for more than 50 years.

Englishman Walter Hammond holds the record for the fewest number of Test innings needed to reach 7000 runs - a feat he achieved in his 131st innings way back in 1946.

Steve Smith is on the verge of becoming the quickest man to reach 7000 Test runs. Pic: Getty

Few would bet against Smith getting the necessary runs in the series against Pakistan, but perhaps his biggest obstacle in Australia's first innings are his own teammates.

Aussie top order put Pakistan to the sword

Australia will resume day three on 1-312 with David Warner (151 n.o.) and Marnus Labuschagne (55 n.o.) looking to extend the home side's lead.

However, even if Smith doesn't manage to make the 27 runs in his first innings at the Gabba, he will still have six more chances to equal the record - such has been the dominance of his batting.

Warner showed no signs of giving his wicket away on Friday afternoon, while Labuschagne is hunting a maiden Test century.

Australia will begin day three 72 runs ahead of Pakistan's first-innings total and seeking to inflict further pain on an attack that features two teenage quicks.

Joe Burns (97) was the only wicket to fall on Friday, the Queenslander shattered when he dragged a sweep shot onto his stumps to end a dominant innings just short of a fifth Test century.

Naseem Shah, at 16 the youngest to make a Test debut in Australia, left the field prematurely on Friday after bowling 16 brisk but wicketless overs in five separate spells.

Team management insisted there were no injury concerns.

FASTEST TO 7000 TEST RUNS

* Walter Hammond - 131 innings

* Virender Sehwag - 134

* Sachin Tendulkar - 136

* Garfield Sobers - 138

* Kumar Sangakkara - 138

* Virat Kholi - 138

* Steve Smith - 6973 runs in 124 innings

With AAP