PHOTO: AFP
Shah, 28, has not played since Pakistan's opening pool match against India but coach Waqar Younis said he was being considered as a replacement for injured fast bowler Mohammad Irfan.
Shah has only played two One Day Internationals in his career but showed good form against the Australians, capturing 12 wickets in last year's 2-0 test series win.
Waqar said he could be picked depending on the state of the Adelaide Oval wicket, according to Reuters.
"We have discussed Shah but we will look at the pitch and if it's conducive then we will see how it goes," Waqar told reporters on Wednesday.
"It's a big game, a quarter-final of the World Cup and we all are very pleased to be here.”
"We know Australia play very aggressive cricket and we have to match that. We can beat Australia but for that we have to be very positive."
Pakistan lost their first two pool matches of the World Cup but rebounded to win their next four and book their place in the knockout phase.
But their chances of upsetting co-hosts Australia suffered a blow when the towering Irfan was ruled out of the rest of the tournament after suffering a stress fracture in his pelvis.
Read: Losing Irfan ‘huge setback’, says Misbah
"It's unfortunate that we lost Irfan just at the wrong time," Waqar said.
"It's a huge loss. He was an X factor for us but we have got to live with it."
With Irfan unavailable, Pakistan are likely to lean on Wahab Riaz, Sohail Khan, Rahat Ali and Ehsan Adil for their pace attack, although the makeup could change if Shah gets the nod.
"I am pleased with the performance of the fast bowlers, Wahab Riaz has taken responsibility and has been delivering and so has Rahat Ali," Waqar said.
"We have been approaching the games very well in the entire tournament. We had a poor start at the beginning but we came back well.”
"The bowlers know what to do and they are doing well," he added.
Waqar refused to accept that Irfan had not been rested adequately, according to AFP.
"This injury could have happened a long time before, so we can't say that it happened two days ago, it's not easy for us but we have to cope with it," said Waqar.
"I am pleased with the performance of the fast bowlers -- Wahab Riaz has taken responsibility and has been delivering and so has Rahat Ali.
"We have ben approaching the games very well in the entire tournament. We had a poor start at the beginning but we came back well.
Read: Ajmal could be sent as injured Irfan’s replacement: PCB chief
"The bowlers know what to do and they are doing well. Look at the bigger picture, look at what happened in the recent past, losing so many bowlers and some good spinners for other reasons so it's tough but we are handling that well."
Pakistan's preparations for the World Cup were badly hit when their ace spinner Saeed Ajmal was suspended due to an illegal bowling action in September last year.
It got worse when spinning all-rounder Mohammad Hafeez was also banned for his action before he injured his calf while pacemen Junaid Khan had to be withdrawn from the 15-man squad a month before the start of the World Cup with a leg injury.
Waqar did not rule out playing leg-spinner Yasir Shah in place of Irfan on Friday.
Shah took 12 wickets in Pakistan's 2-0 Test series win over Australia in the United Arab Emirates last year -- their first win over the opponents for 20 years.
"Look, we are in a situation where we cannot worry too much. We need to go out and do the best we can. It's a big game, a quarter-final of the World Cup and we all are very pleased to be here.
"We know Australia play very aggressive cricket and we have to match that."
Waqar said Pakistan needed to be positive.
"We can beat Australia but for that we have to be very positive. We have beaten them in the past, even in the last World Cup (2011) so we can do that again if we play to our strengths."
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