Jude Rosenstock said:
Why would you want to assume 100% risk when someone out there would be willing to take care of that for you?
JR,
The simple answer (as given to me by a famous roadie who usually only bet his own) is you assume 100% of the risk for 100% of the profit.
It is the same reason that these highly skilled players will often play short sets for significant cash. The money turns over faster, and they have a chance to win more money than they would in a long, "ahead set" (even though the less skillful player now has a chance at victory).
Our local champ almost always plays on his own dime for just this reason (and we see $3,000 to $10,000 sets several times a year).
Another point is that such players HATE for you to try to get sidebets on their matches. They want every dime that the opponent and his backer are willing to put up. Your sidebet is reducing the potential score for the player. FWIW.