Why not? It would be an interesting contest. I agree with most on here that JMac would win, though I don't think it would be as easy as most people think. JMac is in his 50s and let's face it, Serena, owing to her more modern, evolved game, has cleaner strokes and overall better tennis technique from the baseline (things are very different at the net of course!) Anyway, it would be a great way to increase tennis popularity in the US and would get excellent pay per view ratings. Nike should sponsor it and give the proceeds to cancer research or something! I think JMac would take it seriously and probably win. Serena would too, but if she lost I'm sure she'd say it was just an exhibition. Thoughts?