Ligue 1 leaders Olympique Lyon were held to a goalless draw in driving rain by lowly Valenciennes at Stade Gerland on Saturday.
Four days after qualifying for the Champions League last 16 thanks to a 2-1 win at Fiorentina, the seven times French champions struggled without suspended captain Juninho and injured Ligue 1 top scorer Karim Benzema.
Lyon had most of the possession against Valenciennes, who are now third from bottom, but the waterlogged pitch prevented the home side bypassing a steadfast visiting defence.
Their best chances came soon after the break when Fred brushed the post and Ederson hit the angle of the goal.
Lyon top the table with 34 points from 16 games, six points clear of Nice whose game against Grenoble was postponed after rainstorms also hit the Cote d'Azur.
Referee Philippe Kalt said he would meet representatives of the two clubs before deciding if the game could be played on Sunday.
Olympique Marseille are third on 27 points before their visit to Toulouse on Sunday while fourth-placed Stade Rennes host Paris St Germain who also have 26 points.
In Saturday's other games, Monaco recorded their first win at AJ Auxerre in eight years thanks to Croatian midfielder Nikola Pokrivac's strike from 25 metres in the 24th minute.
Monaco are 10th with 22 points, two behind Le Mans who beat visitors Caen 2-0. Auxerre remain 14th.