And it’s not with his fiancee, Brooklyn Decker (who is all her bikini gallery glory here).

At a recent tennis event in Georgia, Roddick was offering a private, hour-long tennis lesson. For whatever reason (bidding not high enough?) Roddick attempted to woo the ladies by saying he’d do it shirtless.

Next step: Andy offered to give the lesson nude. And a woman bid $15,000 for it according to Lisa Guerreo’s blog. Having posed nude herself (NSFW), Lisa asks the obvious question – what would a nude tennis lesson by Anna Kournikova bring in … but we’d actually take it a step further: How much would you pay to sit on the sidelines and watch Anna give an hour long tennis lesson?

Um … but it’s for a good cause (LA Times via Towleroad)