Pakistan are likely to hand a Test debut to fast bowler Mohammad Wasim Junior in place of Mohammad Ali, who went wicketless in the Multan Test, during the third and final match of the series against England in Karachi.

Pakistan´s injury problems grew with opening batter Imam-ul-Haq ruled out of the third Test, which is starting in Karachi on Saturday.

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The 26-year-old aggravated a hamstring injury on Friday, making Pakistan´s task of avoiding a first home 3-0 Test whitewash all the tougher.

Veteran batsman Azhar Ali is likely to replace Haq, having announced that this will be his last Test.

Bespectacled left-hander Haq batted at number five in the second Test in Multan, scoring 60, as Pakistan lost by 26 runs.

"Imam has a hamstring problem, so he will not play tomorrow´s match," said skipper Babar Azam on Friday.

Azam said injuries had cost Pakistan dearly in the series.

They lost pace spearhead Shaheen Shah Afridi before the series with a knee injury, and Haris Rauf damaged his quad muscle in the first Test in Rawalpindi.

Another fast bowler, Naseem Shah, has failed to recover from a shoulder strain that forced him to miss the second Test, also ruling him out of the final match.

"We have played continuous cricket, and there was no rest, so that is why we are having so many injuries," said Azam on the eve of the Karachi showdown against a confident England.

"It´s not that we are relaxed on fitness, but we have to address fitness issues. We must plan that accordingly if we are playing continuous cricket."

Azam hopes the Karachi pitch will help the spinners.

"The wicket looks dry, and it´s a typical Karachi pitch," he said.

"We will try to have a good result for us. We committed mistakes, and matches were in our hands, so we must not repeat them."

Meanwhile, Pointing to England's 3-0 series win in Sri Lanka in 2018, Stokes said his side would not take the foot off the pedal.

"We won that series before the last test, and there was even more put on to it, knowing that we could become the only English team to register a whitewash in Sri Lanka," Stokes told reporters.

"So, although the series here is done, and we'll still lift the trophy at the end regardless of the result, there's still an extra bit knowing that we could be one of the very few teams that could walk away from Pakistan with a whitewash series."