Los Blancos had won five straight matches in Spain's top flight before being held to a 1-1 draw by Elche on Wednesday, which moved them onto 33 points from 16 matches.
Here, Sports Mole looks at how Madrid could line up against an in-form Celta.
Out: Rodrygo Goes (hamstring)
Madrid's squad is in excellent shape at the moment in terms of injuries, with only Rodrygo Goes, who could be out for the next three months with a hamstring problem, unavailable for selection.
Zidane is expected to resist the temptation to make wholesale changes on Saturday night, meaning that Luka Modric, Casemiro and Toni Kroos could again line up as the midfield three in a 4-3-3 formation.
Eden Hazard appeared as a late substitute against Elche as he works his way back from a muscular problem, but the Belgium international is not yet ready for a start and should again be on the bench.