Pakistan's tour of Australia has ended in defeat and disgrace, after stand-in captain Shahid Afridi was banned for two T20 internationals for ball tampering after he amazingly bit the ball during the two wicket defeat to Australia at the WACA.

Afridi was caught by TV cameras biting down on the ball more than once as Pakistan struggled to force the first win of an already tumultuous tour.

After being charged and admitting ball tampering, Afridi was ruled out of the T20 clash at the MCG on Friday, and another on top.

With rumours swirling that the man he replaced, Mohammad Yousuf, had not played because of a fall-out with coach Intikhab Alam, Afridi said he had disgraced himself in his attempt to help his bowlers.

"Actually I wanted to help out my bowlers,” Shahid Afridi told Geo News.

Match referee Ranjan Madugalle banned Afridi for two matches after holding a hearing following a complaint by on-field umpires Asoka De Silva and Paul Reiffel immediately after the match.

“It is unfortunate what has happened because Afridi was due to lead Pakistan in the Twenty20 match next week against Australia,” coach Intikhab Alam said.

Afridi already had a chequered disciplinary history after being banned for a Test and two one-dayers back in 2005 for deliberately damaging the pitch during a Test match against England.

The day was already a dark one for Pakistan, with the Press Trust of India reporting that the official line of a knee injury keeping Yousuf sidelined was a smokescreen.

"Before the match itself the management had advised Yousuf to take a rest from the fifth match so that Shahid Afridi could lead the team and get some captaincy exposure before the Twenty20 match against Australia next week," a source told PTI.

"But Yousuf flatly refused and insisted he would continue playing. Earlier he had differences with the coaching staff when he wanted TO promote Shahid Afridi up the order and allow Younis Khan to bat lower down the order as he was struggling for form, but again Intikhab refused.

"Apparently there were differences over the issue of dropping Younis Khan and Kamran Akmal for the match after which Yousuf had an argument with Intikhab and Waqar and refused to go for the toss or lead the team."

in the wake of another defeat in Perth, Iqbal Qasim, the chief selector of Pakistan cricket team resigned.

"I am very disappointed, like millions of Pakistanis, over the manner in which the Pakistan team lost the Test series 3-0 and One-day series 5-0," Qasim said.

"As I am responsible for the selection of the team, I quit from my post."

Shoaib Malik is one candidate to take charge of the team for the T20 clash with Australia.