Serena Williams has just won her sixth Wimbledon title but apparently, it's not enough for some people as coach Patrick Mouratoglou's rumored girlfriend has become a victim of body shaming.

Now, "Harry Potter" creator J.K. Rowling has come to her defense.

The whole controversy stemmed from the tweet of user Diego Tristan who wrote, "@jk_rowling @hansmollman ironic then that main reason for her success is that she is built like a man."

The tweet generated some criticisms as one commented, "Would you say she's built like a man to her face? She'd crush you like a soggy raspberry."

Another slammed the body shaming Patrick Mouratoglou's rumored girlfriend, "The issue with you calling her manly is that you're implying women can't body build for their sport."

"Yeah a WOman. Guess that 123 mph serve makes your boys shrivel up so you want to make her the problem," another wrote.

But no greater insult was heaped on the Twitter user than J.K. Rowling who didn't mince words by calling Diego "an idiot" for body shaming Serena Williams.

The "Harry Potter" author shared a photo of Patrick Mouratoglou's rumored girlfriend Serena Williams wearing a red dress on her own Twitter. She wrote, "'she is built like a man'. Yeah, my husband looks just like this in a dress. You're an idiot."

The Guardian described Serena Williams as a transcendental athlete after winning her sixth Wimbledon title in light of all the body shaming insults hurled on her way.

"Even on the morning of Saturday's final, a New York Times story on women's tennis and body-image issues - which couldn't have talked around race more if it had tried - intimated that Serena's competitors aren't as good because they 'choose' not to be, running with the presumption that being muscular makes you less than a woman," it said.

The article went on to add, "More sinister are the nameless, faceless critics lurking on social media and comments sections, giving voice to a society's most hateful impulses."

"What top champion in any sport has received a fraction of the snide remarks that Williams routinely weathers?"