Leo Messi, Neymar and Gerard Pique were three of the Barcelona players who didn't train at the Ciudad Deportiva de Sant Joan Despí on Thursday.
It's likelt that Messi, Neymar and Gerard Pique instead remained inside to do some work on knocks they received during Barça's goalless draw with Juventus on Wednesday.
Despite the club saying all players were available -- minus injured duo Rafinha and Aleix Vidal -- the images revealed Arda Turan training, who has still not had the green light to return to action, but not Messi, Neymar or Pique.
Luis Enrique once again called up B team players Carles Aleña and Alex Carbonell for the session, as well as midfielder Kaptoum.
It's expected Messi, Pique and Neymar will all train later this week, although regardless of any fitness problems Neymar is suspended for the trip to Real Madrid on Sunday.
The players will have Friday off and will return to training on Saturday to prepare for the Clasico.