"[Dembele] depends on the work he does, we will be careful during a time that will be decisive, he has to come back slowly but we think that tomorrow's game is a good time to be there," he revealed.
"Vermaelen is in the final stage of recovery and could join the group next week.
"We will see what happens tomorrow, it's another decisive game."
That opens the door to other options filling in for the back four with Yerry Mina expected to make his debut.
"I won't give Getafe's coach clues, [it could be Lucas] Digne, [Sergio] Busquets," he added.
"[Nelson] Semedo is quick, but that is an emergency rather than a starting option."