If you didn't already know, you'd better recognize now — Serena Williams is a superhero that should never be tried.

As extra proof, arguably the greatest tennis player ever took to her Instagram account Wednesday morning to tell her fans that she chased down a man who swiped her cellphone from a crowded restaurant Tuesday night and, of course, got the device back.

As Williams explains, she was enjoying Chinese food and conversation in a cozy, but cramped restaurant, when she got a weird feeling from a man standing beside her, not knowing if he was a customer or waiting to use the bathroom.

She kept an eye on him, as her cellphone rested in a chair beside her, but when she least expected it, the petty thief was able to snatch the device and flee the restaurant.

As soon as Williams realized it, she threw on her Superwoman cape, sprung up, jumped over some chairs and ran out the restaurant in hot pursuit of the thief. When she chased him down, she kindly asked if he had taken her phone — to which he nervously said it was a mistake and that he picked the wrong device off the table.

Yeah right, dude.

Don't try to serve Serena.

Her whole story can be read via her IG post below.

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(Photo: Grant Lamos IV/Getty Images)