All Wimbledon tennis balls are kept at 68 degrees Fahrenheit because the temperature of the tennis ball affects how it bounces, and all tennis balls must be kept as consistent as possible for competitive reasons.
When the ball is warmer, gas molecules inside the ball expand, which causes it to bounce higher.
When it’s cooler, the molecules shrink, and the ball bounces lower. To make sure the best tennis balls are used and the temperature is kept stable, Wimbledon goes through more than 50,000 tennis balls per year!
More than 54,000 balls are used every year
Every year, over 54,000 Slazenger tennis balls are prepared for Wimbledon. As of last year, the official count was 54,250 balls – enough to provide 48 tins of balls for the Centre and No. 1 Courts and 24 for each outside court on a daily basis.