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US Open Wilson tennis ball at Billie Jean King National Tennis Center – Stock Editorial Photo © zhukovsky #164295770
![Wilson Tennis on Twitter: "@sharonmjay @Tennis_Now @usopen @AustralianOpen The difference between the AO and US Open ball is the felt. The cores are the same but the felt has 2 differences: The Wilson Tennis on Twitter: "@sharonmjay @Tennis_Now @usopen @AustralianOpen The difference between the AO and US Open ball is the felt. The cores are the same but the felt has 2 differences: The](https://pbs.twimg.com/media/DpuoUpMUcAAngx5.jpg)
Wilson Tennis on Twitter: "@sharonmjay @Tennis_Now @usopen @AustralianOpen The difference between the AO and US Open ball is the felt. The cores are the same but the felt has 2 differences: The
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