What colour do you think these tennis balls are? - BBC News

Roger Federer weighs in on the debate as people are divided on whether tennis balls are yellow or green.

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Green or yellow? Colour of tennis balls sparks debate - NZ Herald

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Sir David Attenborough is the reason why tennis balls are yellow

What colour do you think these tennis balls are? - BBC News

What colour are tennis balls? Everyone's divided over these so

Tennis balls are fluorescent yellow thanks to David Attenborough

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What makes you love the game of cricket? - Quora

Visually Impaired tennis