Roger Federer Says Tennis Balls Are Yellow, Sending Fans Into Tailspin

Roger Federer Says Tennis Balls Are Yellow, Sending Fans Into Tailspin Tennis star Roger Federer sent tennis fans into a tailspin on Monday, March 19, when he said tennis balls are yellow, not green. Federer, the world’s top-ranked tennis player, was in Chicago on March 17 to help kick off the preparations for September’s Laver Cup when he was asked by a fan if tennis balls are yellow or green. Twitter user Delaney Dodd shared a clip of her father asking Federer the question on March 19. The clip had earned over 15,000 views at the time of writing. Credit: Delaney Dodd via Storyful