Attacker Alexis Sanchez is a major doubt for Barcelona's home La Liga clash against Real Zaragoza after suffering a knee injury during Chile's 3-1 defeat in Serbia on Wednesday.
Sanchez was hurt in a challenge with Serbian midfielder Luka Milivojevic after just 20 minutes of the game, and was replaced by Manchester United's Angelo Henriquez, who went on to score on his full international debut.
Initial reports suggested he had twisted his right knee, but the full extent of the injury cannot be determined until swelling has subsided.
The former Udinese winger, who has a history of coming back injured from international duty, is to be examined further when he returns to the Camp Nou later on Thursday.
But there is better news for blaugrana fans - the return of club captain Carles Puyol, who has been training alongside those Barca players not away with their national teams this week.
Although yet to receive a full all-clear from the club's medical staff, Puyol is expected to be ready to play against Zaragoza if required.
Alex Song (back) and Adriano Correia (thigh) have also been continuing their recoveries this week. Song is more likely to feature in Saturday's game, for which Sergio Busquets is suspended after picking up his fifth yellow card of the season at Real Mallorca last weekend.