Television speed guns clocked two deliveries by Sami at over 100mph (160 kilometres an hour) during Friday's third One-day International at Peshawar which Pakistan won by four wickets to lead 2-1 in the five-match series.
Yet, few took notice of the rare feat that is not recognised in the record books of the International Cricket Council (ICC), but generates a lot of interest among cricket lovers.
So far, only Akhtar had been timed at that pace in a One-day International when he clocked 100.2 miles per hour in the World Cup game against England at Cape Town last year. But the Rawalpindi Express, as Akhtar is nicknamed, clocked only around 90 miles per hour on Friday even as Sami gained in pace.
Even Sami himself was not aware of what he had achieved. "I don't know, I am not aware of any records," the slim fast bowler said.
An executive of the television company beaming the matches conceded errors were possible in the reading of speed guns, even though the Australian company that makes them guarantees 98 percent accuracy.
Sami has in the past not been regarded as a fast bowler generating express pace like Akhtar or Australia's Brett Lee.