So, this weekend, Serena Williams won her sixth Wimbledon championship. And J.K. Rowling won Twitter.

When the Harry Potter author tweeted her support for Williams, one of her followers replied comparing Serena’s physique to a man’s. Keen tennis fan Rowling served him back on ace.

If Serena defends her US open title in September, she’ll be the first person to achieve the Grand Slam clean sweep since Steffi Graf in 1988, yet some on Twitter felt it was more important to comment on her appearance than her achievements. After overcoming foot surgery and blood clots in her lungs in the past, we’re pretty sure Serena gives a lot more of a stuff about the fact her body works than what trolls on the internet think.

Everyone’s ideas of what’s aesthetically pleasing might be different, but fit and healthy is always going to be beautiful. And muscles are vital for health and everyday activities like, you know, standing up.