Yohan Cabaye played 79 minutes of the game.
Laurent Blanc's men created a number of chances, but in the end it was an own goal from Timothee Kolodziejczak which earned a seventh consecutive victory and a 13-point advantage over Monaco.
Nice goalkeeper David Ospina was put the test, first palming away a powerful strike from Edinson Cavani before producing an even better save to keep out an Zlatan Ibrahimovic volley which appeared to be on course for the bottom right corner.
Ospina was eventually beaten seven minutes after the interval though, and by his own player. Javier Pastore provided a cross for Ibrahimovic to head on to Cavani, whose effort struck Kolodziejczak before nestling in the net.
30. Salvatore Sirigu
5. Marquinhos
2. Thiago Silva
21. Lucas Digne
26. Christophe Jallet
4. Yohan Cabaye 79'
8. Thiago Motta
27. Javier Pastore 66'
9. Edinson Cavani
22. Ezequiel Lavezzi 67'
10. Zlatan Ibrahimovic
Subs
1. Nicolas Douchez
7. Jeremy Menez
13. Alex
14. Blaise Matuidi 79'
17. Maxwell
24. Marco Verratti 66'
29. Lucas Moura 67'