Zidane expects Manchester City to be more motivated when both sides meet considering their recent UEFA ban.
Zidane is expecting a more difficult clash when his Madrid side and City face off in the Champions League later this month.
The Citizens were recently given a two year ban by UEFA for FFP breaches and it has put the plans of the club to tatters.
Although, City have planned to appeal the decision and have ten days to take the case to the Court of Arbitration for Sport.
The highest stage City have reached in the Champions League remains the semis and there is a burning desire for that trophy at the club.
On an individual basis, Guardiola has only gone as far as the quarter-finals with City and recently claimed he could be sacked if he does lose to Real Madrid.
Zidane has now had his say on the scenario.
“It’s a rival who are going to be very, very difficult,” said the Frenchman via BBC.
Zidane added: “For what has happened, their motivation will be immense.
“I’m not going to go into what happened, what is going to happen.
“It’s a team, anyway, who will be a difficult opponent, knowing also how they have been doing in the Premier League. So they will have extra motivation.”