Azhar, Younus Tons Help Pakistan Dominate
Pakistan 304-2 (Younus Khan 111no) v Australia
Second Test, Abu Dhabi, day one
The pair batted together through the final session, in which Australia failed to take a wicket, with Azhar closing on 101 in 223 balls and Younus unbeaten on 111 in 155.
His century comes after he scored two in the first Test in Dubai, which Pakistan won by 221 runs to go 1-0 up in the series.
Openers Ahmed Shehzad (35) and Mohammad Hafeez (45) were the only wickets to fall on a difficult day for Australia which ended with Younus and Azhar extending their unbroken third-wicket partnership to 208.
After Pakistan won the toss and chose to bat, Shehzad and Hafeez gave them a strong start, and had moved the score to 57 in 18 overs when Shehzad was trapped in front by Nathan Lyon.
At lunch, Pakistan were 82 for one but less than 10 overs after the break, Hafeez was caught by Brad Haddin off Mitchell Johnson to make the score 96 for two.
Azhar plugged away while the in-form Younus was more fluent and the pair headed for tea with the score on 158 for two.
In the final session, which was extended due to Australia's slow over-rate, they made good on the foundations they had set earlier on, both reaching three figures shortly before stumps.
Younus, who has now extended his Pakistan record to 27 Test centuries, struck 10 fours and a six in all while Azhar hit six boundaries on the way to his sixth Test century.
While Pakistan named an unchanged line-up from the one that performed so well in Dubai, Australia made two changes.
They dropped left-arm spinner Steve O'Keefe and struggling batsman Alex Doolan, calling up fast bowler Mitchell Starc and all-rounder Glenn Maxwell as their replacements.
Starc bowled 11 wicketless overs and Maxwell, who bowled eight overs, was one of eight bowlers used by Michael Clarke, who bowled a couple of overs himself.
© Cricket World 2014