Barcelona have confirmed Luis Suarez will be sidelined for the next month after their loss to Real Madrid in the Spanish Super Cup.
Zidane, who guided Madrid to a Champions League and La Liga double last season, is joined on the list by Chelsea's Antonio Conte.
For the first time as a Barcelona defender, Gerard Pique admits he feels inferior to Real Madrid after their Super Cup defeat.
Barcelona vice-president Jordi Mestre says the board would prefer "respect not insults" after the club unveiled Paulinho as their new signing.
Robert Fernandez says Barcelona are in a "very difficult situation" as they look to secure deals for Philippe Coutinho and Ousmane Dembele.
Barcelona have confirmed that Luis Suarez will be sidelined for the next month but hope to have Gerard Pique available for Sunday's La Liga game.