PARIS (AP) -- Goals from teenage defender Marquinhos and striker Edinson Cavani helped Paris Saint-Germain beat Toulouse 2-0 at home on Saturday to provisionally take first place in the French league.
Monaco is one point behind PSG and can reclaim top spot if it wins at Reims on Sunday.
Cavani made an impression immediately after replacing Zlatan Ibrahimovic midway through the second half.
He sprinted onto midfielder Adrien Rabiot's long ball and center back Uros Spajic made what appeared to be a clean tackle as Cavani tumbled to the ground.
Referee Saïd Ennjimi did not initially give the spot kick but changed his mind after the linesman flagged for a foul.
Cavani sent goalkeeper Ali Ahamada the wrong way for his second goal of the week after scoring in the 1-0 win at Valenciennes in midweek.
Third-place Marseille won 2-0 at Lorient as Mathieu Valbuena and Andre Ayew scored their first goals of the season.
"The first half wasn't good at all. We weren't in the game and we were lucky not to concede a goal," Marseille coach Elie Baup said. "We weren't strong in the challenge, we weren't committed enough. Luckily the second half was better."
PSG hosts Benfica in the Champions League in midweek and then travels to play bitter rival Marseille on Sunday.
Coach Laurent Blanc put Cavani on the bench and dropped midfielder Javier Pastore altogether following his poor start to the season. Winger Jeremy Menez returned but looked short of fitness.
Despite having a side packed with attacking talent, PSG still struggles to play with fluency. PSG labored to a scrappy win at Valenciennes and again played poorly in a frustrating first half for the home fans.
"What do people ask for in football? We won the league last season and we're unbeaten this season," PSG midfielder Blaise Matuidi said. "We have a big squad and we're well equipped to win trophies."
Toulouse could have scored early on but PSG goalkeeper Salvatore Sirigu kept out Etienne Didot's header after he combined with Denmark forward Martin Braithwaite.
The breakthrough came in the 41st minute when Marco Verratti flicked on Thiago Motta's free kick and Marquinhos beat Ahamada at the second attempt after his first effort was saved and the ball deflected back to him off a defender's leg.
Ibrahimovic, who signed a one-year extenstion to his contract this week, had a quiet game. He found some space in the 60th down the right but Spajic closed him down and Ibrahimovic's shot hit the side netting.
Rabiot, who had a loan spell at Toulouse last season, hit the crossbar with a header from a corner shortly after.
Then, in a rare sight for PSG fans, Ibrahimovic was taken off in the 67th and replaced by Cavani, who scored in the 79th.
Under former PSG coach Carlo Ancelotti, Ibrahimovic played the full 90 minutes in almost every match last season.
Ibrahimovic still managed to stand out, getting into a heated argument with Abel Aguilar after the Colombian midfielder appeared to elbow him in the back, and the imposing Sweden striker then shouted at the Toulouse bench as he walked off.
Marseille withstood spells of pressure before Valbuena -- who got the winner in the corresponding fixture last season -- drilled home a free kick in the 58th minute.
"Lorient has a good approach to the game, they can spread the play all over the pitch and you have to make sure they don't hit you on the break," Baup said.
Midfielder Bryan Pele forced a fine save from Marseille goalkeeper Steve Mandanda before Ayew sealed the win in injury time after being set up by Saber Khalifa.
"We didn't play well enough," Valbuena said. "When you win, a lot of things are concealed but you have to own up to it."
In Saturday's other matches, it is: Evian vs. Bordeaux; Lyon vs. Lille; Nice vs. Guingamp; Saint-Etienne vs. Bastia, and Sochaux vs. Valenciennes.
Also Sunday, Rennes hosts Nantes in their local derby and Montpellier travels to Ajaccio.