Luis Enrique says Lionel Messi, Luis Suarez and Neymar need a functioning midfield and defence behind them to succeed.
The FC crew and the SPI don't give Alaves much of a chance to beat Barcelona in La Liga for a second time this season.
Asier Illarramendi's unstoppable long-distance strike sealed Real Sociedad's 2-1 win at Espanyol on Friday, lifting the Basque club into fourth place.
Jose Gimenez is a major doubt to feature for Atletico Madrid on Sunday after the club said the defender is suffering from a muscle infection.
Barcelona suffered an early-season upset at the hands of newly promoted Alaves. As they travel to Basque country, they'll be out to avenge that loss.
Barcelona will be without Gerard Pique and Arda Turan for Saturday's trip to Alaves after both sat out training on Friday.