After scoring 176 for two in their stipulated 20 overs, Bengal restricted Uttar Pradesh to 162 for nine to emerge winner by 14 runs.
Praveen Kumar's valiant 31-ball 49-run effort went in vain as Bengal kept their cool to add four more points to their tally.
Praveen smashed four boundaries and two sixes, but it was Saha, who had the last laugh.
Saha hit seven fours and two sixes during his blazing knock, before Sayan Mondal, Sanjib Sanyal and Arnab Nandi bagged two wickets each to complete the task for Bengal.
Saha was ably supported by the top-order batsmen in setting a competitive target.
Brief Scores: Bengal 172 for two in 20 overs (Wriddhiman Saha 64, Subhomoy Das 38) beat Uttar Pradesh 162 for nine in 20 overs (Praveen Kumar 49, Eklavya Dwivedi 34) by 14 runs.