Are tennis balls yellow or green? This age-old debate has sparked countless discussions and divided opinions across the nation. Even tennis, Roger Federer has weighed in on the topic.

US Open tennis ball hotel suite enlists fans to pick a side, yellow or green? Plus, Roger Federer's answer The suite is filled with yellow and green decor to help fans decide.

After the tournament, Attenborough suggested switching to a fluorescent ball to improve visibility for viewers. The ...