Having elected to bat, Al-Amin's 94-ball 106 helped Prime Bank get to 307 for 6 in 50 overs. The 23-year-old's century was his highest List-A score, and only his second ton in the format. He added 99 runs for the sixth wicket with Zakir Hasan, who made 50 off 38 balls.
Dolar Mahmud and Shamsul Alam took two wickets each for Khelaghar, while Nazmus Sadat headlined their chase with a 54-ball 56, before they folded for 248 in 47.1 overs.
For Prime Bank, Rubel Hossain, Nahidul Islam and Unmukt Chand took two wickets apiece.
Gazi Group Cricketers registered an eight-wicket victory against Victoria Sporting Club, closing out the game with 112 balls to spare at the Fatullah Cricket Stadium. The victors' Indian recruit Parvez Rasool starred with the ball, taking a four-for, before their openers Anamul Haque and Jahurul Islam struck fifties to set the chase on track.
Anamul made 50 off 47 balls - peppering seven boundaries - while the more senior Jahurul struck 52 off 73 balls with six fours and a six. The opening pair added 101 before Mominul Haque and Nasir Hossain wrapped up the chase with a flurry of boundaries during their unbroken third-wicket stand of 74.
Batting first, Victoria posted a measly 177 in 48.4 overs. Rasool took 4 for 28 while Alauddin Babu and Abu Hider took two each. Uttam Sarkar top-scored for Victoria for the second match in a row, but this time he couldn't get past 29.
Tamim Iqbal's imperious 157 set up a 24-run win for Mohammedan Sporting Club over Kalabagan Krira Chakra at the BKSP-4 ground in Savar. Kamrul Islam Rabbi later took three wickets to strangle Kalabagan's chase.
Batting first, Mohammedan posted 307 for 9 in 50 overs with Tamim amassing more than half the runs. His 157 came off 125 balls and was laced with 18 fours and seven sixes. Shamsur Rahman was the next highest scorer with 38. Sanjit Saha took 4 for 52 off his ten overs.
Kalabagan had important contributions up front, with Mohammad Ashraful making 46, but Hamilton Masakadza and Tushar Imran got out in the sixties and the remainder of the line-up fell cheaply. Apart from Rabbi's 3 for 69, Mehedi Hasan picked up 2 for 56.