I know how you feel. I am currently playing against Nadal in the finals of the Australian Open on master sublevel 10. Each time I broke him, he would break back right away. But when I didn't break him, I could finally hold serve. We're on the second set right now; I'm down a set. Hope you win big in the future.
Thought I might update you: I defeated Nadal for the Australian Open title.
The score was: 4-6 7-6 6-1 6-1.