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Halep, Muguruza are battling injuries, Siegemund is out, and Kvitova could be in. 

Serena looks radiant as a budding mom to be, while other WTA stars also shined.

The Americans will take on first-time finalist Belarus in November.

The squad is enjoying off-court activities before its semifinal match in Florida.

It won't be easy, but these U.S. players have the greatest shot on the dirt.

The American is stepping up her campaign against online hate.

Second seeded Konta pulled out, while Keys, Venus and Vesnina fell early.

The American is the defending champion, but is out with a foot injury.

The event combines the best of both worlds: tennis and food.

The American is moonlighting as an interviewer for the Tennis Channel.

California has inspired some fresh fashion on the tours.

The Mexican city is a sight to behold.

The Americans are in lively spirits in Hawaii for their tie against Germany.

They face Germany in the first round on Saturday.