Neymar's two penalties were not enough as Paris Saint-Germain slumped to a shock 3-2 defeat at struggling Lorient, opening the door for Lille to move atop the French league after it beat Dijon 1-0 on Sunday.
Lille secured a home victory with a first-half goal from attacking midfielder Yusuf Yazici and moved two points ahead of Lyon and three clear of third-place PSG.
Lille and Lyon have lost only two games each, while defending champion PSG has lost five.
After pulling a silly face to celebrate his second penalty, Neymar cut a different figure at the final whistle, throwing his arms up in exasperation as he looked at the defence . An equally frustrated Kylian Mbappe did the same.
This was PSG coach Mauricio Pochettino's first defeat since replacing Thomas Tuchel, who was fired in December.
“We need to increase our tempo and level,” a disappointed Pochettino said. “It was tough game, but we never showed the tempo we needed to win the game.”
But the manner of this loss, with two goals conceded late, will raise concerns with PSG facing Lionel Messi's Barcelona in the Champions League on Feb. 16.
Lorient is languishing in 18th place but took the lead in the 35th minute through captain Laurent Abergel after PSG's Danilo Pereira was closed down on the edge of the penalty area.
“I think we underestimated Lorient, and they believed in themselves,” Pereira said.
Neymar's first penalty came on the stroke of halftime when Houboulang Mendes fouled him and the Brazil star sent goalkeeper Matthieu Dreyer the wrong way.
PSG appealed for another penalty in the 55th for a handball by Mendes, but the referee ruled it out after a video review. Moments later, he awarded one when Mendes fouled striker Mauro Icardi. Neymar again wrong-footed Dreyer from the spot.
But PSG's complacency cost it again as substitute forward Yoane Wissa equalized with 10 minutes left, firing home after playing a near one-two with Terem Moffi.
Moffi then hit the winner in the first minute of injury time after Abergel picked him out on a swift counterattack, and he held off defender Presnel Kimpembe before shooting past goalkeeper Sergio Rico.
“We're not going to get carried away but we're really happy,” Abergel said. “We fought hard.”
Yazici put Lille ahead in the 29th with his 12th goal of the season in all competitions.
He took the ball off hesitant defender Bruno Ecuele Manga inside the penalty area, then showed good footwork to round the goalkeeper and roll the ball in.
Dijon is in 19th place but caused Lille a few problems in the second half, and coach Christophe Galtier looked tense in the closing stages.
The day after 250 fans of struggling Saint-Etienne interrupted the club's training session, the players responded to their demands with a 1-0 win at Nice.
Striker Charles Abi got the winner with just three minutes left as coach Claude Puel secured a much-needed victory against his former side.
“This success is for everyone at the club and for our supporters,” Puel said. “They were constructive yesterday (Saturday) in their discussions. The players listened to them.”
Saint-Etienne is in 16th place.
Elsewhere, Angers beat Nimes 3-1, Metz topped Brest 4-2, and Reims beat Strasbourg 1-0.
Fourth-place Monaco was at Nantes in the late game.
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Jerome Pugmire, The Associated Press