Serena Williams isn't a fan of the serve clock because it turns serve time into rush hour.

Williams rarely came close to the 25-second serve clock limit while racing through a 6-1, 6-2 thrashing of Daria Gavrilova in her Cincinnati opener tonight.

More: Serena's Nike US Open Outfit

Still, the sight of the serve clock initially made the 23-time Grand Slam champion feel as if she had to pick up the pace.

"Yeah, I'm not a fan of it at all, but, you know, it doesn't affect me at all," Williams told the media in Cincinnati. "I'm just not a fan because I play so much faster than the shot clock that when I first played with it, I felt like I had to play faster and I don't, really.

"So I just need to still play at whatever pace I play at even if it says 20 seconds right before I'm about to serve."

Photo credit: Western & Southern Open Facebook