The Catalan giants have largely struggled to show their best form in the opening months of the 2020-21 campaign and are currently down in fifth position in the La Liga table, eight points off the summit.
Here, Sports Mole looks at how Barca could line up when they face Valladolid, who have shown improvement in recent weeks but are still down in 17th position in the table.
Barca boss Koeman will again be unable to call upon injured trio Sergi Roberto, Gerard Pique and Ansu Fati on Tuesday, while Ousmane Dembele remains a major doubt due to a hamstring problem.
Dembele has recently returned to training, but it seems more likely that the France international will feature against Eibar on December 29 than be involved in this game.
Frenkie de Jong should return in the middle of the park, meanwhile, with the Netherlands international potentially replacing Philippe Coutinho, who found it difficult to make his mark against Los Che.