Serena Williams thinks Andy Roddick has a huge butt

Serena Williams is known for having a large derriere, but she actually thinks Andy Roddick has a bigger butt than she does.

Serena sat down with Roddick for an interview that appeared on FOX Sports 1 this week. Roddick asks Williams several questions about the US Open, and brought up Serena’s fashion choices at the tournament. Williams defended the outfits she’s worn, and then she had some fun with Roddick when he asked how he would look in a cat suit like Serena wore.

“How do you think I would look in a cat suit?” Roddick asked.

“I think you would look hot in a cat suit,” said Williams. “I think you would look really hot. You would of course have to adjust it and make it a little longer. Maybe if we just gave it a full-length leg. That cat suit was fabulous.”

“Would my butt look bigger than yours?”

“Yes, because you have a really big butt. You have a huge butt. It’s underrated.”

[Video: Andy Roddick stuffs towels in his butt for Serena impression]

I’m sure Brooklyn Decker will be happy to know that Serena’s been scoping out her husband’s backside. Roddick and Williams have actually been friends for years, and Serena even beat the former No. 1 men’s tennis player when they were much younger. Because they’ve known each other for so long, Roddick was able to bring out a playful side of Serena in the interview. He also described Serena as a “sweet” girl, which is a side of Serena most don’t get to see.

So what does this underrated, huge butt look like? If you’re interested, that’s below:

And if you’re interested in pictures of Serena Williams’ butt click here.