Chasing 245 on Monday, Afghanistan opener Gurbaz and Omarzai stitched a 100-run partnership after the top-order failed to sustain Bangladesh's pace attack led by Mustafizur Rahman.
Gurbaz laid the foundation of Afghanistan's win with 101 off 120 balls, including seven sixes and five fours in the series decider. Omarzai (70 not out) mixed caution with aggression and led the side to the victory rope along with Mohammad Nabi in 48.2 overs.
"In my mind from the last (2023) World Cup, I thought of retiring but if I can play one Champions Trophy it will be great for me," Nabi said after becoming the player of the series.
The next Champions Trophy is being held in 2025 by Pakistan.
������� �������! 🙌— Afghanistan Cricket Board (@ACBofficials) @AzmatOmarzay finishes the match and the series with a big blow down the ground! �🤩Enjoy the winning moments here! 👇#AfghanAtalan | #AFGvBAN | #GloriousNationVictoriousTeam pic.twitter.com/xxI1rZ6O3SNovember 11, 2024
"Just small contributions from my side to the youngsters and my insight to them will be more useful," he added.
Bangladesh, who won the toss, started well as their openers Tanzid Hasan and Soumya Sarkar added 53 inside the first powerplay but Afghanistan rebounded with four quick wickets and left Mehidy Hasan Miraz-led side reeling at 4-72.
Skipper Mehidy and Mahmudullah took charge, sharing a 145-run partnership off 188 balls, and took Bangladesh to 8-244, with Omarzai returning with figures of 4-37 in seven overs.
Mahmudullah missed out on his century but was Bangladesh's top-scorer with a run-a-ball 98 while Mehidy, who was playing his 100th ODI, batted slowly but notched a half-century (66).
With the win over Bangladesh, Afghanistan have now bagged their third consecutive ODI series victory this year.