The international break and the FIFA Virus have already hit Barcelona, but the problems aren't too serious.
Portuguese midfielder André Gomes picked up an injury while playing for the Euro 2016 winners in a friendly against Gibraltar last Thursday, and he returned to Barcelona earlier than expected to undergo tests and find out the extent of the issue.
Turns out it's not that bad:
André Gomes has returned to Barcelona from international duty with Portugual due to an injury. The medical examination undertaken [Sunday morning] by the club’s doctors has confirmed that the player has a muscular contusion on his right leg. In the next week, it will be determined when he can return to the squad.
A musclular bruise is different than a muscular injury, meaning that bruises/contusions are caused by a blow to the area (which is André's case), whereas an injury is actually a stretch or tear of the muscle, which is a lot worse and did not happen to Gomes here.
Just a few days of ice and rest and Gomes will be fine, ready to play the weekend game in La Liga or the Champions League opener against Celtic in 9 days.