Inaki Pena, Hector Bellerin, Marcos Alonso, Sergi Roberto and Franck Kessie are available to Xavi in Barca's first training session after the 3-week break, per Diario Sport.
The latter two are currently finishing their injury recovery.
It is likely that Xavi will call up a few Barca Atletic players in the coming days. It is also possible that there will be an intra-squad friendly between Barcelona's first team and Barca Atletic.
Barca have their next game on December 31, at home against Espanyol.
Source: Diario Sport