you have to enable devmode, it's in the tennis.ini under [3dEngine].
With the game closed, change DevMode from =0 to =1, save changes and then open the game and you'll able to change those things.
When you're done, close the game and then change DevMode back to =0, save again and open the game.
Tour issues by PM or Skype.
If you don't add me nor send me a PM, you might see your chances reduced. Inform me about anything that might have went on with your matches BEFORE deadlines, otherwise, decisions won't be changed.