As Jose Mourinho knows only too well, during international breaks, you have to keep a close eye on your star players.
International setups work differently to club ones and at the end of the day, national coaches do not have to worry about player who is slightly fatigued or carrying a knock – they only care about the next three points, not the whole season.
Add to that the fact that training totally different and you can understand why the FIFA virus affects so many clubs and their players.