Social buzz: Fed Cup frocks, Vandeweghe and Barty on the run

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The Czech Fed Cup squad (Getty)

When you and your Fed Cup squad are looking gorgeous in fabulous frocks, it's tough to go back to tennis kit - isn't that right, Katerina Siniakova?

Sloane Stephens isn't in the USA squad this time round - but she's still all dressed up.

Billie Jean King sends her best wishes to Team USA.

And CoCo Vandeweghe is back and running on a treadmill again after injury - and nobody is happier than doubles partner Ashleigh Barty, who's expecting some hugs.