Millwall toppled Bournemouth, Watford and champions Leicester without conceding a goal at the New Den to reach this stage of the competition.
“They’ve been very good in their previous ties and we’re aware of that,” said Mauricio. “We have a big respect for them and it will be very tough. It’s an important game for us.
“For us, it’s not just a game against Millwall, it’s the chance to go to the next round and a semi-final at Wembley. That is a massive aim for us, a massive challenge. We respect Millwall and we must try to give our best to win the game.