[BreakfastBurrito]

Honestly I think the Williams sisters would have a great chance here. I get more frustrated than just about anyone when people talk of women competing with professional male tennis players, but a setup like the one suggested is extremely advantageous for any two reasonably skilled players.

The deficit between the sheer power with which the Williams sisters hit the ball as compared to a professional man is not that large. It's mainly their court coverage, consistency, and precision that's nowhere close to any professional man. Putting two against one neutralizes these weaknesses to a large extent.