Last year's US Open women's final ended with accusations of sexism and confusion about the rules on coaching during matches. But tennis leaders can't agree on what, if anything, to fix.

A year ago, after a heated dispute between Serena Williams and the umpire who cited her for rules violations before she lost the women's final at the US Open, there were rapid-fire calls for change.

The rule at the heart of the disagreement — that Williams was being coached from the stands, a charge that her coach later admitted was accurate — was derided as outdated, inconsistently applied, and

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