Serena Williams just won her 6th Wimbledon this Saturday. The superstar’s game was a treat to watch.

J.K Rowling, an avid Serena Williams supporter uploaded this picture on Twitter to show that she is #TeamSerena

Now, everyone knows that J.K Rowling is excellent at comebacks and calling out to haters, so you don't want to upset her on social media. You don't.

But obviously, some people have to go ahead and ruin all the fun...

@jk_rowling @hansmollman ironic then that main reason for her success is that she is built like a man

— diegtristan8 (@Rob)

In response to this, Rowling uploaded the following tweet and we don't think it needs ANY explanation.

Yes sir, 'You're an idiot'.