Pakistan started strong with 56 runs, but Azmatullah Umarzai dismissed Imam-ul-Haq for 17 runs in the 11th over.
Ahmed, who came into limelight at the age of 16 when he was selected to play in the Big Bash League for Melbourne Renegades, got his first blow when he dismissed opener Abdullah Shafiq for 58 runs in the 23rd over.
He then dismissed Pakistan’s top scorer in the World Cup, Mohammad Rizwan, while sweeping his next over, taking Pakistan’s score to 120–3.