The French Rugby Federation has confirmed Antoine Dupont suffered a facial fracture during last night's 96-nil Pool A win for the hosts against Namibia at the World Cup.
France are two weeks away from their final Pool game against Italy and three weeks out from a quarter-final.
In the tournament today, Argentina play Samoa in Pool D in Saint Etienne from 4.45.
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All 33 Ireland players trained this morning at the captain's run in Paris.
Andy Farrell's side take on South Africa tomorrow evening in a pivotal clash in Pool B.