For Aryna Sabalenka and Iga Swiatek, their battle for No.1 is more than a rivalry -- it’s a driving force behind their ...

For Aryna Sabalenka and Iga Swiatek, their battle for No.1 is more than a rivalry -- it’s a driving force behind their evolution and the rise of women’s tennis.

Aryna Sabalenka revealed that she once considered retiring a few years ago when she was plagued by persistent double faults.

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