Paris Saint-Germain drew 2-2 with Lille on Sunday in the French league to extend its lead to three points at the halfway stage.
Sweden striker Zlatan Ibrahimovic gave PSG the lead in the 36th minute with a 25-yard free kick that took a deflection off the Lille wall.
But Lille captain Rio Mavuba pounced on a low cross from Salomon Kalou to level with a first-time effort in the 44th before Kalou converted a penalty in the 53rd.
The hosts equalized with an own goal from Lille centerback Marko Basa in the 72nd.
''The boys had an outstanding game and they showed their season is no fluke,'' Lille coach Rene Girard said. ''For us, it's like a victory.''
Lille stayed in third place, one point behind Monaco.
Tensions sometimes flared in a match pitting the most prolific offense in the league, PSG, against the tightest defense, Lille. Mavuba and Ibrahimovic were booked for shoving each other in the 40th.
The defending champion missed two clear-cut chances in the first half. Ezequiel Lavezzi met a cross from PSG left back Lucas Digne in the 22nd but Lille goalkeeper Vincent Enyeama stopped the Argentine winger's half-volley from 10 yards. PSG centerback Thiago Silva then fired over the bar from four yards while attempting to redirect an off-target shot from Ibrahimovic in the 32nd.
Ibrahimovic hit the target four minutes later with a bit of luck for his 15th league goal this season. But Mavuba then made a run from midfield and the unmarked France international equalized with a side-footed effort from 13 yards.
Shortly after halftime, a foul by Digne on Franck Beria gave Lille the opportunity to add a second goal and Kalou wrong-footed goalkeeper Salvatore Sirigu for a 2-1 lead.
Lille survived a goalmouth scramble in the 61st as PSG midfielder Marco Verratti sent a close-range effort wide. But a blunder from Enyeama cost the visitors in the 72nd. The Lille goalkeeper missed his catch from a corner and the ball bounced off Basa's leg and into the net.
PSG increased the pressure in the closing minutes looking for a winner. Adrien Rabiot played in Javier Pastore, but the Argentine playmaker shot straight at Enyeama in the 81st.
Lille also had late chances but Sirigu turned around the post a long-range attempt from substitute Divock Origi in the 88th and Basa sent a header over the bar a minute later.
''I'm not happy with the result but I'm happy with our performance,'' PSG coach Laurent Blanc said. ''I was impressed by the amount of energy spent by Lille. They defended a lot.''
PSG forward Edinson Cavani missed the match because he was in Uruguay to finalize the details of a divorce settlement.
