Eddy Ben Arous has vowed to go after Jonny Sexton as France raise the pressure on Ireland's linchpin fly-half.
Brice Dulin called on France to suffocate Sexton and remove him from Ireland's "vanguard", for Les Bleus to claim victory in Sunday's Millennium Stadium encounter.
The victors will top Pool D and meet Argentina in the quarter-finals, while the losers will face the All Blacks.
Sexton insisted he remained unfazed by the target on his back earlier this week, but that has not stopped France's bully-boy rhetoric.
"I know that he is slow in getting rid of the ball, so I am going to try to put the maximum pressure on him," said prop Ben Arous, a former team-mate of Sexton at Racing Metro.
"I am going to hunt him down as often as possible.
"We are going to go after him 200 per cent because he is the strong man of this team."
France have targeted Sexton for the last two Six Nations campaigns but Ireland still sneaked through both encounters to claim consecutive titles.
Sexton suffered a head injury in Ireland's 22-20 victory over France in Paris in March 2014, that secured Joe Schmidt's men the Six Nations title and handed Brian O'Driscoll the fairytale Test farewell.
Ireland's chief playmaker then returned from a three-month concussion lay-off for the 2015 Six Nations match, enduring a torrid time from juggernaut centre Mathieu Bastareaud.