Imam stayed unbeaten on 132, with Azhar Ali 64 not out, as Pakistan shut on 245-1 in Rawalpindi.
The left-hander thundered and punched the air in enchant in the wake of arriving at his ton in his first Test appearance for more than two years subsequent to being dropped.
"I can't clarify how I'm feeling at present," he said.
"I had conviction that assuming I got an open door I would make the most of it."
Australia in Pakistan 2022
Imam has scored seven one-day worldwide hundreds of years however had battled to change his ability over to the longest arrangement cricket in his past 11 Tests.
His last Test was against Australia in Adelaide in November 2019, where he made two and a duck, prompting him being forgotten about for the aggregate of 2020 and an unused crew part against Bangladesh last year.
He took advantage of his review on a memorable day for Pakistan cricket, scoring generally around the ground on a level pitch against Australia's praised bowling assault.
It is Australia's first visit through Pakistan beginning around 1998.
No worldwide cricket was played in Pakistan for a long time following an assault in the Sri Lanka group by shooters in Lahore in 2009, with most of their home matches being held in the United Arab Emirates all things being equal.
Visiting groups started to return in 2015 and Pakistan facilitated their first home men's Test for a considerable length of time when Sri Lanka went there in 2019.
"Coming to Pakistan to play Test cricket is a definitive," added Imam, who is playing a Test in his local country interestingly.
"I'm appreciative to Australia that they've come.
"The group was remarkable - Pakistan needs that and I want to believe that I added to that over the course of the day."
For set on an initial stand of 105 with individual opener Abdullah Shafique, who tumbled to off-spinner Nathan Lyon for 44.
He then, at that point, aggregated an unbeaten stand of 140 with Azhar and the pair will hope to proceed with Pakistan's strength on day two.
In spite of holding the run rate down, Australia's quick bowlers Mitchell Starc, Josh Hazlewood, Pat Cummins and Cameron Green all went wicketless.
Skipper Cummins had to go to the parttime twist of Travis Head, Marnus Labuschagne and Steve Smith, with Australia maybe previously mourning their choice not to play a second bleeding edge spinner.
The travelers wore dark armbands in memory of previous wicketkeeper Rod Marsh, who kicked the bucket matured 74 on Friday, while there was additionally brief's quietness before play.
It is Australia's first away Test since the beginning of the Covid pandemic, with their last abroad Test the last match of the 2019 Ashes in England.
It is additionally Australia's first Test since their 4-0 Ashes succeed at home this colder time of year, after which lead trainer Justin Langer surrendered, with between time mentor Andrew McDonald in control in Pakistan.
After the three Tests, Australia face Pakistan in three ODIs and an oddball Twenty20 worldwide.
New Zealand men's group deserted their arranged visit through Pakistan last year following an administration "security alert".
Britain likewise pulled out their people's groups from planned series in Pakistan.
Britain's men will currently play seven T20s in Pakistan in September prior to returning for three Tests in November and December after the following T20 World Cup in Australia.
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