Third-placed Marseille, tied on 35 points with leaders Paris Saint-Germain, host eighth-ranked Saint-Etienne on Sunday having won one of their last five home league games.
While they have the French league's best away record with seven victories from 10 games, including the last three, they were thrashed 4-1 by Olympique Lyon and 3-0 by Lorient in their last two home encounters.
"We should have more points. We collapsed in some games. I can't explain that," Gignac, who scored a superb goal to earn his side a 1-0 win at Toulouse last weekend, told the club website.
Even if we lose, we have to fight... we can't afford to collapse like that."
"We can produce great performances at home. There's is no 'Velodrome' syndrome," he told reporters. "We just have to be more consistent."
Sunday's game could be the ideal occasion for a home recovery as Saint-Etienne have endured a 500-minutes goal drought and have lost two of their last three league matches.
"Puel was our coach for three years, and they were not good times for Lyon and our fans. He left on bad terms, with the whole football community having a bad opinion of him," Aulas said.
Nice will again bet on Argentine front-man Dario Cvitanich, who has scored seven goals in as many games and has already been dubbed "best catch of the close season" after he was signed for 400,000 euros.
Fourth-placed Lorient, who are on 30 points - the club's best tally from 18 games - host promoted Stade Reims on the same day.
