Parker Pen Challenge Cup competitors Narbonne will go into their second round match up with London Irish without the services Alain Teixidor.
The former Treviso coach was in his second season in charge of the Mediterranean side, but will not see the term out due to a series of poor results.
Club president Gilbert Ysern has called on Jean-Francois Beltran and Andre Delpoux to step into the breach for the rest of the season.
Beltran is Narbonne's director of sport who has previously coached Castres and Perpignan, while Delpoux is a former Perpignan No 8 who coaches Narbonne's junior teams.
