Photo via @serenawilliams

For the world's best tennis players battling it out at the U.S. Open, which officially kicked off on Monday, the challenge is twofold: Winning on the courts and at capturing it all on Instagram. Here's a guide to the best contenders for following the action, which'll keep Flushing Meadows in New York buzzing until September 10.

Who: Venus Williams
Handle: @venuswilliams
Why: She may be second to Serena in holding the most Grand Slam titles, but when it comes to hair, Venus has her sister beat: She's been sporting red braids this summer everywhere from New York to Rio.

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#mornings #madrid ☀️😃🌳

A post shared by Novak Djokovic (@djokernole) on

Who: Novak Djoković
Handle: @djokernole
Why: The #1 men's singles player in the world, Djoko, who's Serbian, is all about enthusiasm, whether for Enrique Iglesias or playing the violin.

Who: Andy Murray
Handle: @andymurray
Why: The Scottish player, #2 in the world, isn't afraid to show off his muscles (and his dog, Rusty.)

Who: John Isner
Handle: @johnrisner
Why: The star server, who stands at 6'10", is another big animal lover, and has a dog named Ollie.

Who: Ana Ivanovic
Handle: @anaivanovic
Why: Also from Serbia, Ivanonic is ranked #25 and happens to be a master at foodstagrams.

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Pokemon catturato... 😡💪😜

A post shared by Fabio Fognini (@fabiofogna) on

Who: Fabio Fognini
Handle: @fabiofogna
Why: Italy's #1 player, Fabio hangs out everywhere from Rio to pool floaties to the woods.

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And that's a wrap #cantwait

A post shared by Serena Williams (@serenawilliams) on

Who: Serena Williams
Handle: @serenawilliams
Why: Between her various magazine covers and runway appearances, Serena also finds time for Snapchat filters and some serious dance vids.

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A post shared by GАЯВIÑE МUGUЯUΖΑ (@garbimuguruza) on

Who: Garbiñe Muguruza
Handle: @garbimuguruza
Why: Venezulan and just 22, Muguruza's feed is part workout, part ombré hair inspiration.

Who: Laura Robson
Handle: @laurarobson5
Why: The British 22-year-old, back from a three-year injury, knows a good #drakeoncake when she sees one.

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Another day another city!

A post shared by Caroline Wozniacki (@carowozniacki) on

Who: Caroline Wozniacki
Handle: @carowozniacki
Why: The Danish player does yoga with a view and takes selfies with Serena.

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