New Zealand wool can be found in clothing and people's homes - but it's set to be bouncing around the courts of the next US Open.

Tennis balls made with wool sourced from farms throughout the country will be served up by the world’s top-ranked players when the tournament gets under way this weekend. 

NZ Wool Services trading manager Nathan Watt says New Zealand-produced wool is widely regarded as the best in the world for tennis balls.

"We've got the best-coloured wool in the world for strong wool, so it's perfect for tennis ball felt."

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