WATCH: Umpires fail to call 21 Pakistan no-balls on second day

Pakistan’s 16-year-old Naseem Shah took the wicket of Australia’s explosive opener David Warner only for replays to show that he had overstepped the line, which resulted in a no-ball on the second day of the first Test match against Australia at the Gabba in Brisbane on Friday.

Further replays showed that the young pacer had bowled three previous no-balls in the over which were not called by the umpire.

It turns out there were around 21 times that the umpires failed to spot a no-ball bowled by the Pakistan bowlers.

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In a video shared by Australia cricketer Trent Copeland on his Twitter account, the Seven Sports analyst is displaying the no-balls missed by umpires Joel Wilson and Marais Erasmus in a mere two sessions.

This is astonishing.

Huge talking point & something the ICC HAS to look at.

21 no balls not called in two sessions...🙊 #AUSvPAK @7Cricket @7Sport pic.twitter.com/SAdFIWuGw4

— Trent Copeland (@copes9) November 22, 2019

After the no-ball that deprived Naseem of his first Test wicket, the commentators wondered aloud how the bowlers were expected to make the necessary adjustments if the umpire fails to call the no-balls being bowled.

"Naseem Shah wasn't called on a couple this morning," former Test cricketer Michael Slater said during commentary for Channel 7. "We were saying at the time that he needs to know he's overstepping. Therefore he was unable to know he was doing it and try to make an adjustment. He was well over and he has been on a number of occasions today. It's cost him. Gee, that hurts. It's a big let-off for Warner."

Australia’s former women’s cricketer Lisa Sthalekar, through a tweet, called for the implementation of mechanisms that points out when the bowlers overstep so that they can make the necessary adjustments.