The figure-hugging red dress Serena Williams wore on Wednesday’s ‘Late Night Show’ can best be summed up by this snippet of her chat with host David Letterman."I think I saw your eyes almost pop out there,” Williams said.Responded Letterman, "Well, I think so ... That’s not the only thing.”TV viewers surely could have done without that imagery from the 65-year-old Letterman, but there’s no question the outfit was a stunner. Victoria Beckham designed Williams’ dress. Williams’ shoes were $4000 Christian Louboutin Decorapumps. And there’s no word on who designed her diamond ring, but it was gaudy enough to make most rappers’ jewelry look modest.Showing up to Letterman was easy for Williams because she’s in New York this week preparing for the start of the U.S. Open on Monday. She discussed the gold medal she won at the Olympics, the damage tennis has done to her feet and why she plays better on grass than any other surface.Letterman, of course, had to ask whether she’d consider playing tennis in her slinky red dress and heels."Wouldn’t that be great?” Williams laughed. "Of course, I wouldn’t get to any balls.”