He along with Imam-Ul-Haq gave Pakistan a flying start as they were 89 for no loss at lunch.
"I knew that my chance would come, so I waited and waited and thanks God I have done myself proud by getting six wickets on debut, it's a tremendous feeling", said Asif. Only India's 10 for 46 against England in 1946, and New Zealand's 10 for 51 runs against Australia at in 1974 were worse. Usman Khawaja covered the line of the ball bowled by Yasir and that blinded Sarfraz Ahmed, who couldn't gather the ball down the leg in order to stump the batsman.
The openers then slowly began opening up to put the pressure back on the hosts.
Khawaja's growing confidence in conditions he had typically struggled in was on display when he reverse-swept Yasir for four off consecutive deliveries. Even though the spinners did find assistance on the surface, it wasn't threatening enough in the morning session as the batsmen used their feet to good effect to counter the turn. Finch fell prey to Pakistan's plan and hit one straight to short mid on and that was followed by Shaun Marsh edging one to slip.
Three Australian players are making Test debuts in this match - Aaron Finch, Travis Head and Labuschagne.
Hafeez top-scored for Pakistan in their opening knock with 126, with Haris Sohail (110) striking a maiden Test century as his side posted 482. Last time Australia played three debutants in the same Test was quite recent at Adelaide against South Africa in November 2016 - Matt Renshaw, Peter Handscomb and Nic Maddinson. The decision made sense with the pitch expected to deteriorate further in the last two days.
Usman Khawaja of Australia looks dejected after being dismissed by Bilal Asif of Pakistan during day three of the first test.
Despite being jolted by spinner Jon Holland's two key wickets of Mohammad Hafeez (17) and Azhar Ali (four), Pakistan closed the day on 45-3, having an overall lead of 325 with seven second-innings wickets intact to force a win.