Maxwell is set to start for PSG as they welcome Manchester City in the French capital on Wednesday, and he has hailed his opponent, Sergio Aguero, whilst insisting his side must cautious of him.
"Aguero is a magnificent player. I love his style," Maxwell said.
"He is like Romario, small and powerful. We must not leave spaces."
PSG are favourites to win the tie, but with Manchester City reaching this stage for the first time in the clubs history, they will be throwing everything at the French Champions.
Maxwell has recognised this, and is aware PSG must not sit back, as it won't be a walk in the park.
"Their results have not been good against big teams, but that is not a reason to be optimistic. It's dangerous to think like that," he said.
"We respect them, we know they can beat us. But we are confident we have the qualities to go through."