By Martin Gough
BBC Sport in Benoni
West Indies captain Carl Hooper has called on his side to complete a "big, big win" over woeful Bangladesh on Tuesday.
Hooper sees the Sri Lankan game as key to Windies ambitions
Bangladesh's latest humiliation was a 10-wicket defeat at the hands of Sri Lanka on Friday, following on from a 60-run upset against Canada.
Hooper knows his side's key match to clinch qualification for the second round will be against Sri Lanka on 28 February.
But he cautioned his side to avoid complacency when playing the lesser teams.
"We've got to take a leaf out of Sri Lanka's book and get the game over and done with efficiently," he told BBC Sport.
"People have done the maths already but what if one of the smaller sides throws a spanner in the works?
"We've got to have fun but play the game properly and win convincingly."
West Indies followed a surprise victory in the opening match of the tournament against hosts South Africa with a disappointing 20-run defeat to New Zealand on Thursday.
West Indies' remaining Pool B games
18 Feb: v Bangladesh, Benoni
23 Feb: v Canada, Centurion
28 Feb: v Sri Lanka, Cape Town
4 Mar: v Kenya, Kimberley
"It's hard to put my finger on what went wrong because we bowled well but it wasn't a 240 wicket," Hooper said.
"We batted poorly but, if you are going to have a bad game, better to have it in the preliminary round than the Super Six."
Home fans will be following West Indies' fortunes closely over the next two weeks as South Africa's hopes of reaching the next stage rest on the Caribbean team winning their remaining matches.
But Hooper pointed out it is in his side's interests to see South Africa reach the Super Six stage as a group win against fellow qualifiers gains four points for the next round.
"It will be nice to have their support but we've got to take points into the Super Six," he explained.
"It would be good for us if we had the points against South Africa."