The Brazilians visit the Prince Moulay Abdellah Stadium chasing continental glory in what will be their 50th match of an exhausting and congested 2025/26 campaign.
Allende admitted the demanding schedule comes with the territory at a club of Sundowns’ stature but stresses the squad is encouraged by carrying a 1-0 advantage into Rabat following the first leg at home.
"Yes, like you are saying, it was important to win without conceding a goal at home and we have to prepare in the best way now as a collective," said Allende.
"We're coming off a lot of games in this last part of the season but we know we are Mamelodi [Sundowns] and we know we have a lot of games across a lot of competitions, and we want to win everyone.
"So this is the pressure when you play for this type of club, and I think everyone is clear on this, and we have to keep a good mentality and focus."
In his time at Sundowns so far, Allende has seen how important the Champions League is to the hierarchy and the supporters.
"We're not fighting this stage for the first time, we're always stay inside the four best [teams] in Africa, and we know how important this tournament is for the club and all the players," he added.
"So we keep pushing and the target is to lift this trophy, which for me is the most important thing on the continent."