Substitute Jeremie Boga scored with a solo run in injury time to give Nice a 1-0 win at local rival Monaco on Friday after United States internationalFolarin Balogun had missed two penalties for the hosts.
Balogun was making his first start for Monaco after joining from Arsenal and had his first spot kick saved by goalkeeper Marcin Bulka in the 12th minute.
The striker got a second chance in the 56th, but again only managed a low penalty that was Bulka was able to parry.
Jeremie Boga scores for Nice vs. Monaco
Monaco then paid the price when Boga burst forward in the first minute of added time and broke into the area before holding off a defender and slotting a shot inside the far post to hand Monaco its first loss of the season.
The win puts Nice provisionally in first place on 12 points from six rounds, one point ahead of Monaco.
Brest or Marseille could overtake the lead with a win this weekend.