Pakistan take nine wickets on first day; CRICKET.
Australia had recovered from the loss of two early wickets to assume control in the afternoon with a stand of 120 between Simon Katich and Michael Clarke before Asif struck from the Pavilion End.
Using the slope and the gloomy conditions to full effect, Asif moved the ball prodigiously and he trapped Clarke lbw for 47 with the final delivery before tea.
In his first over after the resumption, Asif had Katich caught behind for 80 and then bowled Marcus North for a third-ball duck to complete a stunning double-wicket maiden. Asif's vital spell not only checked Australia's growing momentum but Ricky Ponting's men crashed from 172 for two to 229 for nine - losing seven wickets for 58 runs.
When bad light stopped play after 70 overs, Mike Hussey was unbeaten on 38 with tail-ender Doug Bollinger yet to score.
Asif and Mohammad Aamer finished the day with three wickets apiece while leg-spinner Danish Kaneria chipped in with two and Umar Gul claimed the other.
The matches are being played in England because of the security situation in Pakistan, with Lord's hosting its first neutral Test since 1912.
Pakistan won the toss and claimed the early initiative as Aamer capitalised on the bowler-friendly conditions in his second over taking Shane Watson's stumps for four.
Ponting made 26 when he was snared by a brilliant reaction catch at short leg from debutant Umar Amin as he looked to work Aamer onto the leg side.
Australia rebuilt well but Asif snared Katich with a delivery which moved down the slope to catch the outside edge before he beat North with an inswinger to uproot the off stump. Umar Gul had debutant wicket-keeper Tim Paine caught behind for a 46-ball seven with a delivery that moved back up the hill. Kaneria then sent Steve Smith and Mitchell Johnson packing in quick succession.