Hello everyone
As Killroy mentioned, injuries are generated on random and there is no way to forecast them. But still there are some things Managers can do in order to minimize them. Here are some tips:
a) Develop the facilities in your stadium: a good pitch can reduce the chances for injuries and medical facility helps to heal the players
b) Don’t train your squad too much: especially if you are playing more than one game per day (like at the beginning of a season), since players are more tired
c) For the same reasons, avoid arranging friendly matches (you won't be affected by friendly matches not arranged by you)
d) Keep your players well rested before each match maybe with the aid of green (physical condition) boosters.
Btw in the end of 2015, after receiving a lot of feedback from our Managers, the injuries in Top Eleven got updated in the following manner:
1. Scout players won't be injured for some period after they were bought.
2. Players won't get injured few times in a row. (This is concerning any specific player and does not state that injuries may not happen for several players in a row)
3. You won't have more than one injury per team during the match.