Toulon - Wales scrumhalf Rhys Webb, who was already told he would never play for Toulon again, had his freeze-out confirmed on Thursday when he was ignored for the French side's European Challenge Cup clash at the Scarlets.
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"This weekend, he is not in the squad," said Toulon coach Patrice Collazo.
"I feel that he is not able to be competitive for the game.
"To play at a high level you have to feel good both rugby-wise and psychologically. I feel that he has neither of the two at the moment."
Toulon club owner Bernard Lemaitre hit out at the "dishonest" attitude surrounding the player's planned return home last weekend.
Webb, 31, was originally set to leave the three-time European champions at the end of the season to move back to the Ospreys.
The Welsh Rugby Union announced Webb would be eligible to feature in this year's Six Nations after being given an exemption from a rule requiring players to have more than 60 caps if they wish to represent their country while playing abroad.
"His family is back in Wales, it's difficult for him. We made beach-sized amounts of time for him to be able to go back and see his family in Wales," Lemaitre, who took over majority ownership of Toulon from Mourad Boudjellal last month, told Sud Radio.
"All of a sudden we learn he has already signed for the Ospreys and his agent had already negotiated with the Welsh union that he can be selected. It's a dishonest attitude."