Lyon's lead at the top of the table has been cut to four points after they were held to a last-gasp home draw with Rennes.
The champions went into Sunday's late game well aware that second-placed Paris St Germain had won at home to Nancy, and the pressure was therefore on.
Lyon, though, looked set to meet the challenge as Kim Kallstrom's 66th minute goal appeared to have earned the victory.
However, Rennes grabbed a share of the spoils with a goal in the 90th minute from Jimmy Briand.
Paul Le Guen's PSG maintained the pressure on the leaders with a commanding 4-1 win over visitors Nancy.
A brace from striker Guillaume Hoarau, either side of Ludovic Giuly's 13th minute strike, gave the hosts a 3-1 half-time lead after Julien Ferret had briefly reduced the arrears for Nancy in the 29th minute.
A fourth goal from Stephane Sessegnon after the interval put a share of the points firmly beyond Nancy's reach.
On what proved to be a positive day for several serious contenders, Marseille's 1-0 win away to Caen, courtesy of Brandao's 66th minute goal, moved them up to third place on 48 points, one adrift of PSG.
Bordeaux made sure they joined the chase with a 1-0 win at home to Lorient thanks to a goal from Marouane Chamakh, moving Laurent Blanc's side, champions in 1999, up to fourth, one point adrift of Marseille and two behind PSG.
Struggling St Etienne were denied three points at Monaco as substitute Yohan Mollo struck in the last minute to secure a 2-2 draw.
The home side had taken the lead through Frederic Nimani (20), but St Etienne came from behind as Dimitri Payet (25) and Daisuke Matsui (60) netted.
However, Mollo, who had come off the bench shortly after the hour-mark, scored a 90th minute equaliser to grab a point.