In all matches used balls will be replaced by new balls at the conclusion of the first seven games and thereafter at the conclusion of every ninth game.
Hereof, how often are tennis balls changed at US Open?
The Number of Balls used in the US Open
In a Grand Slam, there are the men’s and women’s singles, doubles, and mixed doubles. And so there are over 300 matches. All these matches need new balls. After every nine games, the balls are changed.
Correspondingly, why are tennis balls kept in the fridge?
Throughout history, fridges have been deployed at the side of courts to maintain the consistency of bounce in every ball while they’re waiting to be used. The 53,000 balls used at the tournament will be kept at 20 degrees until it’s their time to shine.
Why are Wimbledon balls kept at 68 degrees?
Warmer temperatures make the ball’s interior gas molecules expand, creating a higher bounce. … Because of the effect of temperature on ball performance, all 54,000+ balls used during Wimbledon are kept at exactly 68°F.
It all comes down to hair. The hair on a new tennis ball tends to be smoothed flat, while a ball that’s been knocked around a bit will be more fluffy. … The smooth ball is used for the first serve. Because the hairs are flattened down, the ball travels faster than an older ball, which should make it harder to return.