An outstanding performance on debut from spinner Sohag Gazi and half-centuries from batsmen Tamim Iqbal and Naeem Islam carried Bangladesh to a convincing seven-wicket triumph over the West Indies in Friday's first ODI in Khulna.

Gazi converted his superb form in the Test series to success in the limited-overs fold, with his figures of four for 29 fetching the Man of the Match award - and affording the hosts a vital lead in the five-fixture affair.

For all skipper Darren Sammy's ambition of a series whitewash, which he insisted the Windies would aim for in the build-up to this match, his side were admittedly outdone.

Sammy's decision to bat first imploded at the hands of the home spinners, with Gazi's four-for and left-armer Abdur Razzak's three-for doing the bulk of the damage in a total of 199 all out in 46.5 overs.

35 each for opener Chris Gayle and the left-handed Darren Bravo was as good as it got at the top of the knock, while the Windies' finally tally would have read considerably worse were it not for a 57-run stand between tail-enders Sunil Narine and Ravi Rampaul.

Bangladesh's reply was swift and thorough, Iqbal leading the charge en route to a 51-ball 59 and Islam completing the job thanks to a measured 50 not out. Opener Anamul Haque, meanwhile, weighed in with a promising 41 on debut.

The West Indians opened their attack with the turn of all-rounder Marlon Samuels, and allowed spinner Narine every opportunity to strike. Neither obliged regularly enough, though, leaving the Tigers triumphant with a resounding 58 deliveries to spare.

The second ODI gets underway at the same venue, the Sheikh Abu Naser Stadium, on Sunday.