Fast bowler Shoaib Akhtar has lodged an appeal against the two-year ban imposed after he failed a drugs test.
Shoaib has played 42 Tests and 133 one-dayers for Pakistan
"We have received Shoaib's appeal today [Wednesday], which was the last date for filing appeals.
"Shoaib wants his appeal to be heard as soon as possible," a Pakistan Cricket Board spokesman confirmed.
Team-mate Mohammad Asif is also appealing against a one-year ban after testing positive for the same steroid, nandrolone, as Shoaib.
The appeals will be heard by retired judge Fakhruddin Ebrahim, former Test player Hasib Ahsan and Dr Danish Zaheer.
"The tribunal will now inform the players of the date of the hearing. It is up to the tribunal to decide the time period to dispense with the appeals," the PCB spokesman added.
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It has been claimed there were traces of nandrolone in nutritional supplements the pair were taking.
And Shoaib's doctor, Hamed Tauseef Razzaq, has vowed: "We will show the world he is innocent."
The 31-year-old's international career could be over unless his ban is overturned or substantially reduced.
It would be difficult for anyone who is 30-plus and out of the games to come back, not just him," Pakistan captain Inzamam-ul-Haq said on Tuesday.
"I know [Australia's] Shane Warne was older, but he was only banned for a year and it is easier for spinners."
The situation is not quite so serious for Asif who, at 23, has many years of cricket ahead of him.
"I would say Asif was a victim of innocence. When he injured his elbow he took an injection for that, otherwise he was taking a powder which I was not aware of. When I came to know about it I stopped him," said team physio Darryn Lifeson.
"Asif takes training very seriously and is a fantastic guy to work with, honest, hard-working and a very good man."