So basically you've got to figure how many sets you can get behind and still be able to catch up?
Edit: You'll be almost ready to lose the 19th consecutive set. Add 57 (hint: Heinz "ketchup") and you have 76 points.
A: 76 points. You start by going up 5 games and 40-love (3 points). Your opponent then needs 5 points to win that game, and 6 more games (24 points) to win the first set 7-5, 24 points to win the second set 6-0 and then another 23 points to be at 5 games and 40-love in the third set