High Performance Sport New Zealand is calling for a top-up from corporate funding.

For Olympic sports to maintain their current level of competition, HPSNZ's chief executive suggests the country's top sports seek sponsorship from the business world to 'maximise the revenue'.

Former Olympic rower Mahe Drysdale says most of New Zealand's biggest sports have corporate partners already, but it can be a tough market.

"They're all fighting for funding, and that's behind rugby, cricket, netball. So it's a pretty crowded space."

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