I suspect male hitting partners tone it down when they practice with female pros. As others have pointed out, not the same thing. In any event, regarding the lose-lose nature of a Serena-Mac exo, yes, it could be looked at that way. And if so I think the bigger risk would be Serena's, as *if* Mac got beat he could always plead age. That being said I think this exo could be a HUGE WIN FOR TENNIS. Serena and Mac, each in their own way, have transcended tennis and are known and have appeal in the general culture. And we're just coming up on the 40 year anniversary of the King-Riggs Battle of the Sexes. The TV audience almost certainly wouldn't be as large, but a worldwide Internet audience? The sky's the limit! The timing is right for Netflix or Youtube (Google), both of which have the online infrastructure in place, and both of which are moving quickly to establish themselves as content providers, to underwrite the production and delivery of this event. Do it in Vegas. Serena can pull in some of her buds, (Jay-Z, Beyonce) Mac his (Sandler, Baldwin). There are a lot of bits that could coalesce to make this a killer!