New Zealand, without sidelined bowlers Shane Bond and Jacob Oram, conceded 348 for six, with Matthew Hayden making 103, before being bowled out for 133 as they suffered a 215-run defeat - the largest ever inflicted upon a Test nation at a World Cup.
One consolation for New Zealand captain Fleming was that his side were already in the semi-finals, where they play Sri Lanka in Jamaica on Tuesday.
"If there is a positive, we haven't wasted a good performance," said Fleming after Friday's loss where opener Peter Fulton's 62 was the lone notable score in an innings that barely lasted 25 overs.
"We haven't wasted anything at all really - so we're just going to get up, wipe it off and look forward.
"Now it comes down to two games, and if we start analysing too much we won't look forward to what is coming up - we have an opportunity to win two games for the World Cup.
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During their 3-0 whitewash of an under-strength Australia during February's Chappell-Hadlee series in New Zealand, Flemi