Nice were unbeaten in 14 matches overall before this game and went close to equalizing in the first half, but PSG goalkeeper Gianluigi Donnarumma kept out efforts from Nicolas Pepe and striker Terem Moffi.
Veteran defender Dante’s shot came off the underside of the crossbar and appeared to cross the line in the 51st. But referee Jeremie Pignard was not alerted by goal-line technology that it crossed, even though video replays showed a goal should likely have been awarded.
Donnarumma kept out more shots from Pepe and Youssouf Ndayishimiye as Nice kept up the pressure on PSG, who have lost eight matches in 2023.
Nice hit the crossbar late on in a match of wasted chances.
Under-pressure PSG coach Christophe Galtier returned to the club he coached last season. But Nice’s ultras greeted Galtier with an insulting chant and unfurled a derogatory banner about him.