By Courtney Nguyen
July 17, 2014

Roger Federer takes his vacation from land to air, Andy Roddick questions his fitness, Victoria Azarenka pulls out a great #tbt and Billie Jean King photobombs a selfie (that means it's probably a pretty great selfie). Here are the best tweets from the week.

Welcome to World Team Tennis, Taylor.

More on this tweet here.

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