Real Madrid have difficult matches ahead - Sevilla, Borussia and Atletico Madrid. The team is not ready to physically play all three matches. There are many injured players. Real needs to defeat Borussia in order not to depend on the result of the Shakhtar vs Inter match. This is a rather difficult task at the moment ...
The task is difficult, but doable for Real Madrid. The team has character and there is Zidane who knows how to set players up for important matches. I suppose that Real Madrid can sacrifice other matches in order to save energy for the match with Borussia. For Real Madrid, the Champions League will always prioritize other tournaments and matches.
You can't win the game on motivation alone. If Zidane is such a strong motivator, why couldn't he motivate the team to win the game against Shakhtar? After all, he said that the game is very important. The players are tired. Modrich, Cross, Varane play constantly. There are no substitutes for them. There are no players who can strengthen the game either. They can win against Borussia, but losing to Seville and Atletico Madrid, they will put an end to LaLiga.