There’s a new ad for “Top Spin 4″ out on Kotaku now, and the 2K Sports tennis sim has taken a new angle toward marketing: sex. And after the jump you can see Serena Williams, sans trou, and some white chick, as you can see picture above. Hey hon, you make a better door than a…actually, I’m good. Never mind.

So someone had the bright idea that Serena without pants would actually want to make me buy a tennis video game? Are Luigi and Yoshi playable characters? No? Then keep walking. And tell Serena to put here drawers back on.

The 60-second spot already has 2K execs backpedalling, claiming that it wasn’t “part of the final marketing campaign.” Uh huh. I’d buy “Top Spin” AND “MLB 2K11″ just to win the million dollars to pay Serena as ransom toward her own body. Don’t get me wrong, I’m equal opportunity, but I can only take so much junk in my trunk.

Video’s after the jump…if you dare.