Whatever you do, do not mess with Serena Williams.
In a hilarious video created with Glamour magazine, the tennis star serves up a healthy dose of revenge for all of the sexist comments women in sport receive.
"I'm here to express some of the frustrations I have about the obnoxious things men sometimes say about women," she says.
"I'm doing this for all of womenkind."
She then starts firing tennis balls at a heckler wearing body armour as he repeats some of the all too familiar phrases.
"You're really talented, for a girl."
"Calm down."
"You should smile more."
"How much time do you spend picking out your competition outfits?"
"Do you think you could ever beat a guy?"
The list of his offensive comments goes on a on, but thankfully, so does the player's kick-ass serve.
Serena, we salute you.
