Sammy, the former ODI captain, was speaking as the Caribbean side prepared to put up a better showing in their second warm-up match yesterday against Sri Lanka.
The Windies lost to Australia by a four-wicket margin last Saturday.
“ODI cricket is an area where we have not done as well as we should. When you look at the calibre of the players we have in the dressing room, we should be playing better,” said Sammy.
“Hopefully, in this tournament we will come out and play the brand of cricket which helped us to win in Sri Lanka last year.”
The Windies have been drawn in Group B alongside India, Pakistan and South Africa. They will open their campaign against Pakistan on Friday at the Oval.