I read of others getting by CPU player set at Master level. I guess you are just much better than I am. In my CPU matches, the CPU player is currently set with all skills at 50% (overall 775) and is at sub-master (or mid-master) level (halfway). I keep making her a bit stronger every time that I beat her decisively such that I have this option. Right now, I can get close to beating her, but she comes back harder than real Nadal or anyone else -- incredible.
Just look at this shot, as an example of what I am facing. I have brought her to the net with a drop shot, which she returns; then, I hit what is supposed to be a passing shot to her left, and it appears to be a winner. But nooooooooooo! Not with this girl! Right as the ball is passing her, she turns her back to me, gets her racket into position, and turns her entire body around as she swings through with a winning angled mini-slice backhand drop-shot:











She's an animal. After shots like this, especially when I am up 3-0 and think I just might win, she crushes me, and I fall apart. Then, she goes on to maybe win the next 6 games. This is killing me. Why is she so difficult to beat, even with just 50% skills?