The Lorient players celebrate.
Photo: Mark.
Paris Saint-Germain will have to apply a lot to establish itself as the club with the most titles in the French league after Lorient stunned the reigning champions 3-1 on Sunday.
Olympique de Marseille, second in the standings, came from behind to beat Auxerre 2-1 and cut PSG's lead at the top to five points.
"The title is in our hands, we can't let it slip like this, especially in games like this at home," said the PSG defender.
'We were bad in duels, always late.
We cannot be conceding goals in pressing moments'.
PSG fans did not hide their annoyance at the players' signs of reluctance, booing them as they left the field after relegation and then after the final whistle.
PSG were short-handed from the 20th minute after Achraf Hakimi received his second yellow card for stamping on Darlin Yongwa.
The right-back had already been booked for a mistimed tackle on Romain Faivre after five minutes.
Lorient capitalized on a stretch of the game in which they seized possession and took the lead after 15 minutes with Enzo Le Fee's goal.
Kylian Mbappé scored the temporary equalizer after 29 minutes by taking advantage of Yvon Mvogo's lack of concentration.
The Lorient goalkeeper put the ball still, believing that a free kick had been taken, but the referee ordered play to continue.
Mbappé couldn't believe his luck in pushing him into the back of the net and establishing himself as the league's top scorer with 23 goals.
Faivre made evident the fragility of PSG at 39. He transferred the ball at will in front of Marco Verratti and Juan Bernat before yielding to Yongwa, who made it 2-1.
Substitute Bamba Dieng sealed the win by grabbing a rebound from a counterattack in the 88th minute.
Lorient broke a streak of five games without winning and remains halfway.
PSG is still very watered down, but they rescued victories thanks to the genius of Lionel Messi and Mbappé.
"We have a lot of players who have underperformed in this second part of the season," said PSG coach Christophe Galtier.
The Parisians try to leave Marseille and Saint Étienne behind in the all-time title table, all with 10. Chilean striker Alexis Sánchez scored the winning goal for Marseille by beating the offside trap and slipping the ball between the goalkeeper Ionut Radu's legs in the 77th minute.
Auxerre struck first with Birama Toure's volley goal in the 33rd. Cengiz Under leveled in the 75th.
Monaco loses thrashed
Arnaud Nordin scored two goals and provided an assist as Montpellier beat Monaco 4-0 to a side that sees the goal of qualifying for the next Champions League far away.
Fourth in the table, Monaco would take a ticket to the Europa League.
He is five points behind the third Lens who has a game to go.
Montpellier picked up three important points in their fight to avoid relegation.
They opened a distance of 11 units over the fateful zone with five dates to go.
Other results
With a brace from Belgian Jeremy Doku, Rennes beat bottom club Angers 4-2, officially doomed to relegation.
Rennes is still in the race for the European places, three points behind the fifth Lille.
Thanks to Grejohn Kyei's early goal, Clermont secured their first-division stay with their follow-up win over Reims 1-0, climbing to eighth place.
Nice defeated Troyes 1-0 to snap a three-game losing streak.
(With information from AP)