I do not know what the game is here, apart from the polls and media trying to 'manage' the result.
Yesterday the BBC published a Harris poll for a French TV station. It said that Fillon would beat Le Pen 66:33. Sky's poll showed that currently Fillon is on 26%, Le Pen on 24%, Hollande's lot on 9%, another centre left party on 13% and the far-left on 15%.
The two do not compute.
Actually I do know what they are doing. They will keep telling the French that Fillon is so far ahead of Le Pen, based on an assumption that those who would normally vote for the left will see that left-wing parties have no chance, and then hope to get them behind Fillon in order to stop Le Pen.