Chasing just 114, Smriti Mandhana and Sophie Devine took their time to make 25 runs in the Power-play, including hitting three boundaries collectively off Marizanne Kapp.
Bangladesh will host Zimbabwe for a five-match T20I series against Zimbabwe slated for May ahead of the T20 World Cup co-hosted by the USA and the West Indies from June 1
Though Sen saved three game points to level the scores at 20-all with resolute defending, Lee Zii Jia kept his nerve to take the game on his fourth opportunity
Iyer suffered discomfort in his back during India's second Test against England in the recently concluded series. He was dropped from the remaining three games.
