The French giants trail Arsenal by three points in Group A going into the all-important fixture and Arsene Wenger is desperate for the Gunners to finish top of their group for the first time since 2011/12.
Sanchez and Walcott have scored eight goals apiece in all competitions this term and Matuidi has issued a warning to his team-mates ahead of the Emirates clash.
Speaking exclusively to Metro.co.uk, Matuidi said: ‘Their whole team is extremely dangerous.
‘Of course they have individual players like Sanchez and Walcott, who can cause us serious problems, but I think their main strength is the team as a whole.’
The Gunners duo have suffered injury problems in the lead-up to the European tie but both are expected to be fit to face PSG at the Emirates.