Marquinhos thinks Paris Saint-Germain's season will be "wasted" if they do not retain their Coupe de France title against Rennes on Saturday.
PSG coasted to Ligue 1 success this term, but that is the only trophy to their name, with Strasbourg winning the Coupe de la Ligue and Manchester United knocking them out of the Champions League.
Having lost in the Coupe de la Ligue, the club are already guaranteed less silverware than last year, when they won a domestic treble but elected not to keep head coach Unai Emery for a third season in charge.