4.28pm And they've declared! Sarfraz says 'come back', and Lyon stranded on a four-for. Australia need 538 to win, or need to survive a minimum of 192 overs to save the Test. Useful contributions through the batting order from Pakistan, and now the focus shifts onto their batsmen. Can they take a couple of wickets before stumps? We'll find out when we return in a moment with the fourth innings.

Asim Shahzad: "Pakistan must take full advantage of Usman Khwaja`s absense. Get couple of wickets today and get the aussies at the back foot.. Go green.. "

Huzaifa Zahid: "Right decision, Abbas and Hamza will start with a new ball, if they tired getting 550 its hard for them to get early break throughs."

Aqeel: "Nathan Lyon - Only Century in the match so far"

Muhammad Abdulr: "what happened to Usman khawaja?" -- suffered a knee injury while warming up before the start of today

Grace: "Sarfraz - Why should Lyon get a 5 when I don't get a 100?"

Shabbir: "Pak can take 2, 3 wickets today of tired Aussies team now"

Umer Arif: "Usman Khawaja was not on the field. Do you think he is going to open the bat? If he is not going to open the bat then who would be?" -- Khawaja can bat only at No.7 or lower since he's been away. Maybe Shaun Marsh and Finch will open?

Can Lyon finish with a five-for?

Hassan: "(Ashamed of myself but) I'm happy Sarfaraz is out. Hope the next one goes soon so this test match can finally move on after 2 hours"

Anthony Sherrat: "Why are people criticising Pakistan? They have no need to rush. It's not as if rain is going to save Australia and there's no way they can bat for two days on this pitch. Grind them down make them tired both physically and mentally."

abrar: "Better to let the tired Australia bat today rather than rested till tomorrow."

Farhan Shahzad: "I think Pakistan do not deserve criticism. There is more than enough time to bowl Aussies out"

MGM: "Sarfraz dear, forget your 100, let Australia bat today."