That definitely stinks. BOO!
Do you have any doctor at all? If not, you might think of going to a level 2 or 3 doctor. Can definitely help.
Also, if your trainee is the type who draws a lot of fouls, you might have to scout your opponent and put your trainee in an offensive position where he will be defended by a low fouling player on the other team.
You can always train stamina or free throw- both of those will train injured guys.