Paris Saint-Germain defender Maxwell has called on his teammates to "keep a sharp eye" on Barcelona duo Neymar and Lionel Messi when they meet in the Champions League.

The two sides go head to head in the French capital tonight in one of the more glamorous ties of this season's competition.

With Barca boasting the talents of Neymar and Messi up front, Maxwell admits that PSG will have to be fully focused if they want to stop the duo.

"Neymar? It's very difficult to play against a player of his quality, and that's even more true now as he combines perfectly with [Lionel] Messi.

"We will have to keep a sharp eye on those two, but of course we should not focus only on them as there's a lot of talent in that team."

PSG drew their opening match of this season's competition against Ajax, while Barca beat APOEL.