Real Mallorca coach Javier Aguirre is under no illusions facing Barcelona in midweek.
Aguirre says Barca are clearly stronger with Joao Cancelo and Joao Felix.
He said, "They are a fearsome and unstoppable team with the two Joaos (Félix and Cancelo).
"We must try to design something to counter their game."
Aguirre also said, "We have seen two games in which Barça really suffered. One was in Getafe and the other against Celta. Seeing what your colleagues (José Bordalás and Rafa Benítez) are doing, plus your own virtues, we have tried to design something to counteract their game.
"It is difficult, we know it, but we play eleven against eleven, we are at home, we have been beaten (after the 5-3 defeat in Girona), but we have to do our best and rise to the occasion."