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Sir David Attenborough: yellow tennis balls
On Sir David Attenborough's 100th Birthday, BBC Sport look into his role in changing the colour of tennis balls to yellow.
↗ https://www.bbc.co.uk/sport/tennis/videos/cg4pkpwky22oOn Sir David Attenborough's 100th Birthday, BBC Sport look into his role in changing the colour of tennis balls to yellow.
↗ https://www.bbc.co.uk/sport/tennis/videos/cg4pkpwky22o