Serena Williams Shatters Glass Window with Tennis Ball on David Letterman

Ken ChinSocial Media StaffAugust 22, 2014

David Letterman

Serena Williams has returned to New York to defend her U.S. Open title starting Monday, but she made a quick stop on the Late Show with David Letterman to hit some tennis balls. 

Letterman rallied a bit with Serena, but the real fun started when the tennis star showed off her power. Williams' serve has been clocked at a top speed of 128.6 mph, so it's no wonder Letterman wanted to see if she could break a glass window with a tennis ball. 

Not only did she shatter the glass, she did so wearing high heels and a pencil skirt—and it looked like she wasn't even trying. 

[Late Show with David Letterman, h/t For the Win