If you want me to discuss if this is a bug or not, I can't say, I have the same knowledge as everyone. I would say that's unlucky, but I have no way to rule out a bug.
I have for the third time the same player Manuel Tirado (16548914) injured luckily for one week this time. Since 21/6 (date of transaction) my player has been injured for 3 times (injured in my first game for 2 weeks and the following game after recovery for 2 weeks more and now for one week). I have a strong (8) doctor. It has been frustrating. Please fix that BUG.