A Napier wine has been deemed the best in the world. 

The city's Church Road Winery has won Best Chardonnay at the International Wine Challenge. 

Chief Winemaker Chris Scott told Mike Hosking that they've already been struggling to keep up with demand, and he reckons this will exacerbate the problem. 

Despite the local vineyard getting the accolade, France, Australia, and Spain remain top of the medal table. 

Kennedy Point Vineyard, based in Waiheke Island, has won Best Syrah, taking the title off France. 

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