PARIS, Feb 18 (Reuters) - Second-placed Racing Lens failed to keep pace with leaders Olympique Lyon after being held to a goalless draw by struggling Monaco in Ligue 1 on Sunday.
The result ended Lens's run of four wins in all competitions and means champions Lyon, 2-1 winners at Lille on Friday, have increased their lead at the top to 13 points over the weekend.
Lens stay second five points clear of Lille and Sochaux, who beat visiting Le Mans 2-0 on Saturday. Monaco lie 14th, only four points clear of the relegation zone.
The visitors dominated most of the game on a bumpy Monaco pitch but failed to capitalise.
Their best chance came in the 78th minute when an Olivier Monterrubio freekick was followed by a scramble in the Monaco area.
Goalkeeper Flavio Roma had to make two desperate saves to stop Lens's Adama Coulibaly and Aruna Dindane from scoring.
In today's other top flight game, Marseille's home clash with Nantes also ended goalless.