Naseem Shah may be just a teenager but his fiery bowling has given him a top position on the bowling charts.

On Monday, Naseem grabbed 5-31 in Pakistan's series-clinching win over Sri Lanka in Karachi to become the youngest fast bowler at 16 years 307 days to achieve the feat.

He broke the record of Mohammad Amir, who made his mark with his first five-wicket haul at 17 years 257 days against Australia in Melbourne 10 years ago.

Naseem's feat has prompted the cricket world to take notice of the precocious ability.

Belief in his talent, Naseem says, has been the key.

"I had belief in my hard work and talent so when I got the chance I tried my best," said Naseem. "I am elated that my feat on a home ground and before my own people has contributed in the win.

"I know this is just the beginning and if I keep up the hard work more rewards will come my way."

Naseem's landmark moment capped a three-month fast track progress from a precocious talent to one of the leaders of Pakistan's bowling attack.

He has been in the limelight for some time but it was in October this year that national selectors decided to throw him in the deep when he took nine wickets in a domestic match.

Four days later he was on the plane to Australia for the two-match Test series, a move described as 'throwing a cub before the wolves'. Pakistan's bowling coach Waqar Younis — himself a lethal fast bowler — likened Naseem to former Australian great paceman Dennis Lillee.

"He's got a very strong action. He reminds me of Dennis Lillee actually. He's got a very similar action," Waqar said before the first Test in Brisbane.

"He's not as big as Dennis — Dennis was a big guy — but when he gets it right, he's a handful. He's very talented with his pace the key."

Naseem made people take notice with his short burst of eight overs against Australia A, claiming Marcus Harris's wicket with a sharp bouncer.

That was after he received the news of his mother's death back home. But he showed steely resolve as a week later he was played in the first Test in Brisbane.

He claimed dashing Australian opener David Warner twice, first off a no-ball on 56 and then on 154.

Warner appreciated Naseem's talent.

"He charged in, and there's a superstar there," said Warner.

"If Waqar can get a hold of them (Naseem and other young bowlers) and get their lines and lengths and their engines going, they're going to be a force to be reckoned with in the future."

Tough start

It was a tough baptism for Naseem, who hails from the small town of Lower Dir, in Khyber Pakhtunkhwa.

Naseem said his father was against his playing cricket.

"Those were tough days," recalls Naseem. "My father used to say 'why [do] you play the sport of foreigners, instead study'."

But cricket was at the core of his life.

"There were not much facilities in my village so I used to play with tape ball. I watched Waqar and Shoaib Akhtar on television but I liked Shane Bond's (New Zealand fast bowler) action.

"Then I moved to Lahore and played cricket there and it was there I got more opportunities and then I was selected for Pakistan Under-16."

The rest is, as they say, history.

Waqar believes Naseem can go places with his talent.

"He knows what he's doing and knows where to reach in cricket."