The 30-year old has reiterated that Wednesday's game between the two sides is about the bragging rights and not just the result
The game has earned the nickname of Le Classique from supporters, and the full-back has promised that the rivalry between the two clubs will make it a game to remember for supporters.
"There will never be a friendly match between Marseille and PSG, it means so much more than the result ever could. Personally it stimulates me," he explains to L'Equipe.
"I'm a child of the country so I know what it means to the fans. When it goes well, the fans are proud, they are elated. I don't even want to think about if it goes wrong."
Fanni and his Marseille team-mates have enjoyed a weekend of rest after their Ligue 1 encounter was postponed because of strong winds at the Stade Velodrome, but the disruption is of concern to coach Elie Baup.
"We needed the game against Lyon to make sure there is no mad run of games later in the season. This could be a problem for us."