Manu, I wrote it the last week, but it wasn't fixed.
1st: A) - Match: Zverev - Murray. I tried to take control of Murray (player 2), and I set the same controls of player 1, but player 1 (Zverev) was the CPU. I set Zverev as Incredible sublevel 1, but he played as newbie, with lot of errors and serving very very slow.
B) I gave up the match and tried to do the same with Merz - Del Potro, taking control of Delpo (player 2), but it didn't happen again, Merz was playing as incredible, as I set him. I gave up from the match and reloaded to day 4 (I saved my game before Zverev - Murray) and I played again, taking control of Murray once again, withot problem. I closed the match clicking on the "X" at the right top of the screen.
C) After that, I opened the game again and set "not to see Zverev - Murray", but I wanted to see (and play) Merz - Delpo, and then Merz was playing as I described in A), as newbie.
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It happened again when I took control of Roger (player 2) against Zverev (player 1). I closed the game after the 1st set, clicking the X at the top right of the screen. I opened the game today and Zverev played as a newbie!! It seems CPU changes his level, because I set it as incredible, and CPU wasn't clearly play as incredible.