The US Open is switching tennis balls for women's matches so they're the same ones the men use

Men and women will use the same tennis ball this year at the U.S. Open, satisfying some women who complained last year they were hitting an inferior product.

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At U.S. Open, Do Women Play With Faster Tennis Balls? - WSJ

The US Open is switching tennis balls for women's matches so they're the same ones the men use - The San Diego Union-Tribune

Iga Swiatek bests Ons Jabeur to claim 1st U.S. Open title, 3rd Grand Slam

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Not All Tennis Balls Are Equal - The New York Times