surely now all clubs are tidying up and preparing for next season. but it seems that currently the one who is relaxed is Barcelona because unlike other teams participating in the Club World Cup and surely Barcelona when competing later their stamina will certainly have the potential to be stronger.
I am sure that a long break will not be comfortable enough for players who are used to playing with short breaks. By playing, they actually maintain their fitness. With a long break, players should do their own training to keep their stamina up.
And actually, something that is an advantage for teams participating in the Club World Cup. Especially those who have new coaches or new players who can be played. So each team can prepare for the tighter competition next season.